Talk:World Trade Center/old
World Trade Center | |
---|---|
![]() The World Trade Center's Twin Towers | |
General information | |
Status | Destroyed on September 11, 2001 |
Location | New York City, NY, U.S. |
Owner | Port Authority of New York and New Jersey |
Height | |
Antenna spire | 1,727 ft (526.3 m) |
Roof | 1,368 ft (417.0 m) |
Top floor | 1,355 ft (413.0 m) |
Technical details | |
Floor area | 8.6 million sq ft 800,000 m² (1 & 2) |
Lifts/elevators | 198 (1 & 2) |
Design and construction | |
Architect(s) | Minoru Yamasaki Emery Roth & Sons |
Engineer | Leslie E. Robertson Associates |
The World Trade Center (sometimes informally the WTC or Twin Towers) was a seven-building complex in Lower Manhattan (New York City) that was destroyed in the September 11 attacks. The World Trade Center was designed by Minoru Yamasaki who used an innovative tube-frame structural design for the twin 110-story towers. The elevator system in the towers utilized large-capacity express elevators which went to sky lobbies, along with local elevators serving individual floors. In gaining approval for the project in the early 1960s, the Port Authority of New York and New Jersey agreed to take over the Hudson & Manhattan Railroad which became the Port Authority Trans-Hudson (PATH). Groundbreaking for the World Trade Center took place on August 5, 1966. The North Tower was completed in December 1970 and the South Tower was finished in July 1971. Construction of the World Trade Center involved excavating a large amount of material which was used in making Battery Park City on the west side of Lower Manhattan.
The complex, located in the heart of New York City's downtown financial district, contained 13.4 million square feet (1.24 million m²) of office space.[1] An observation deck was located atop the South Tower, while the Windows on the World restaurant was located at the top floor of the North Tower. Other World Trade Center buildings included the Marriott World Trade Center, 6 World Trade Center, which housed the United States Customs, and 7 World Trade Center which was built in the 1980s. The World Trade Center experienced a fire in February 1975 and a bombing on February 26, 1993. In 1998, the Port Authority decided to privatize the World Trade Center, leasing the buildings to a private company to manage, and awarded the lease to Silverstein Properties in July 2001.
On the morning of September 11, 2001, al-Qaeda-affiliated hijackers flew two Boeing 767 jets into each tower in a coordinated suicide attack. After burning for 59 minutes, the South Tower collapsed, followed a half-hour later by the North Tower, with the attacks on World Trade Center resulting in 2,750 deaths. 7 World Trade Center collapsed later in the day and the other buildings in the complex were also destroyed. The process of cleanup and recovery at the World Trade Center site took eight months. The first new building at the site was 7 World Trade Center which opened in May 2006. The Lower Manhattan Development Corporation (LMDC), established in November 2001 to oversee the rebuilding process, organized competitions to select a site plan and memorial design. Memory Foundations, designed by Daniel Libeskind, was selected as the master plan, which included the 1,368 ft Freedom Tower, three office towers along Church Street and a memorial designed by Michael Arad.
Planning and construction
The idea of establishing a world trade center in New York City was first proposed in 1946. The New York State Legislature passed a bill authorizing New York Governor Thomas E. Dewey to begin developing plans for the project[2] but the plans were put on hold in 1949.[3] During the late 1940s and 1950s, economic growth in New York City was concentrated in Midtown Manhattan, while Lower Manhattan was left out. To help stimulate urban renewal, David Rockefeller suggested that the Port Authority build a World Trade Center in Lower Manhattan.[4]
Initial plans, made public in 1961, identified a site along the East River for the World Trade Center.[5] As a bi-state agency, the Port Authority required approval from both the governors of New York and New Jersey in order to undertake new projects. New Jersey Governor Robert B. Meyner objected to New York getting a $335 million project.[6] Toward the end of 1961, negotiations with outgoing New Jersey Governor Meyner reached a stalemate.[7]
At the time, ridership on New Jersey's Hudson and Manhattan Railroad (H&M) had declined substantially from a high of 113 million riders in 1927 to 26 million in 1958 after new automobile tunnels and bridges had opened across the Hudson River.[8] In a December 1961 meeting between Port Authority director Austin J. Tobin and newly elected New Jersey Governor Richard J. Hughes, the Port Authority offered to take over the Hudson & Manhattan Railroad to have it become the Port Authority Trans-Hudson (PATH). The Port Authority also decided to move the World Trade Center project to the Hudson Terminal building site on the west side of Lower Manhattan, a more convenient location for New Jersey commuters arriving via PATH.[7] With the new location and Port Authority acquisition of the H&M Railroad, New Jersey agreed to support the World Trade Center project.[9]
Approval was also needed from New York City Mayor John Lindsay and the New York City Council. Disagreements with the city centered on tax issues. On August 3, 1966, an agreement was reached that the Port Authority would make annual payments to the City in lieu of taxes for the portion of the World Trade Center leased to private tenants.[10] In subsequent years, the payments would rise as the real estate tax rate increased.[11]
Architectural design
On September 20, 1962, the Port Authority announced the selection of Minoru Yamasaki as lead architect and Emery Roth & Sons as associate architects.[12] Yamasaki devised the plan to incorporate twin towers; Yamasaki's original plan called for the towers to be 80 stories tall.[13] In order to meet the Port Authority's requirement to build 10 million square feet (930,000 m²) of office space, the buildings would each need to be 110 stories tall.[14]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e4/World_Trade_Center_Building_Design_with_Floor_and_Elevator_Arrangement.svg/220px-World_Trade_Center_Building_Design_with_Floor_and_Elevator_Arrangement.svg.png)
A major limiting factor in building height is the issue of elevators; the taller the building, the more elevators are needed to service the building, requiring more space-consuming elevator banks.[14] Yamasaki and the engineers decided to use a new system with sky lobbies; floors where people could switch from a large-capacity express elevator which serves the sky lobbies, to a local elevator that goes to each floor in a section. This allowed the local elevators to be stacked within the same elevator shaft. Located on the 44th and 78th floors of each tower, the sky lobbies enabled the elevators to be used efficiently, increasing the amount of usable space on each floor from 62 to 75 percent by reducing the number of required elevator shafts.[15].[16] Altogether, the World Trade Center had 95 express and local elevators.[17] This system was inspired by the New York City Subway system whose lines include local stations where local trains stop and express stations where all trains stop.[18]
Yamasaki's design for the World Trade Center, unveiled to the public on January 18, 1964, called for a square plan approximately 207 feet (63 m) in dimension on each side.[13][19] The buildings were designed with narrow office windows 18 inches (45 cm) wide, which reflected Yamasaki's fear of heights as well as his desire to make building occupants feel secure.[20] Yamasaki's design included building facades sheathed in aluminum-alloy.[21] The World Trade Center was one of the most striking American implementations of the architectural ethic of Le Corbusier and it was the seminal expression of Yamasaki's gothic modernist tendencies.[22]
In addition to the twin towers, the plan for the World Trade Center complex included four other low-rise buildings which were built in the early 1970s. The 47-story 7 World Trade Center building was added in the 1980s to the north of the main complex. Altogether, the main World Trade Center complex occupied a 16 acres (65,000 m2) superblock.[23]
Structural design
The structural engineering firm Worthington, Skilling, Helle & Jackson worked to implement Yamasaki's design, developing the tube-frame structural system used in the twin towers. The Port Authority's Engineering Department served as foundation engineers, Joseph R. Loring & Associates as electrical engineers, and Jaros, Baum & Bolles as mechanical engineers. Tishman Realty & Construction Company was the general contractor on the World Trade Center project. Guy F. Tozzoli, director of the World Trade Department at the Port Authority, and Rino M. Monti, the Port Authority's Chief Engineer, oversaw the project.[24] As an interstate agency, the Port Authority was not subject to local laws and regulations of the City of New York including building codes. Nonetheless, the structural engineers of the World Trade Center ended up following draft versions of the new 1968 building codes.[25]
The tube-frame design of the World Trade Center towers was a new approach which allowed open floor plans rather than columns distributed throughout the interior to support building loads as had traditionally been done. The World Trade Center towers utilized high-strength, load-bearing perimeter steel columns called Vierendeel trusses that were spaced closely together to form a strong, rigid wall structure, supporting virtually all lateral loads such as wind loads, and sharing the gravity load with the core columns. The perimeter structure containing 59 columns per side was constructed with extensive use of prefabricated modular pieces each consisting of three columns, three stories tall, connected by spandrel plates.[25] The spandrel plates were welded to the columns to create the modular pieces off-site at the fabrication shop.[26] Adjacent modules were bolted together with the splices occurring at mid-span of the columns and spandrels. The spandrel plates were located at each floor, transmitting shear stress between columns, allowing them to work together in resisting lateral loads. The joints between modules were staggered vertically so the column splices between adjacent modules were not at the same floor.[25]
The core of the towers housed the elevator and utility shafts, restrooms, three stairwells, and other support spaces. The core of each tower was a rectangular area 87 by 135 feet (27 by 41 m) and contained 47 steel columns running from the bedrock to the top of the tower. The large, column-free space between the perimeter and core was bridged by prefabricated floor trusses. The floors supported their own weight as well as live loads, providing lateral stability to the exterior walls and distributing wind loads among the exterior walls.[27] The floors consisted of 4 inch (10 cm) thick lightweight concrete slabs laid on a fluted steel deck. A grid of lightweight bridging trusses and main trusses supported the floors. The trusses connected to the perimeter at alternate columns and were on 6 foot 8 inch (2.03 m) centers. The top chords of the trusses were bolted to seats welded to the spandrels on the exterior side and a channel welded to the core columns on the interior side. The floors were connected to the perimeter spandrel plates with viscoelastic dampers which helped reduce the amount of sway felt by building occupants. The trusses supported a 4-inch (100 mm) thick lightweight concrete floor slab with shear connections for composite action.[28]
Hat trusses (or "outrigger truss") located from the 107th floor to the top of the buildings were designed to support a tall communication antenna on top of each building.[29] Only 1 WTC (north tower) actually had an antenna fitted; it was added in 1978.[30] The truss system consisted of six trusses along the long axis of the core and four along the short axis. This truss system allowed some load redistribution between the perimeter and core columns and supported the transmission tower.[31]
The tube frame design using steel core and perimeter columns protected with sprayed-on fire resistant material created a relatively lightweight structure that would sway more in response to the wind compared to traditional structures such as the Empire State Building that have thick, heavy masonry for fireproofing of steel structural elements.[32] During the design process, wind tunnel tests were done to establish design wind pressures that the World Trade Center towers could be subjected to and structural response to those forces.[33] Experiments also were done to evaluate how much sway occupants could comfortably tolerate, however, many subjects experienced dizziness and other ill effects.[34] One of the chief engineers Leslie Robertson worked with Canadian engineer Alan G. Davenport to develop viscoelastic dampers to absorb some of the sway. These viscoelastic dampers, used throughout the structures at the joints between floor trusses and perimeter columns along with some other structural modifications, reduced the building sway to an acceptable level.[35]
Construction
In March 1965, the Port Authority began acquiring property at the World Trade Center site.[36] Demolition work began on March 21, 1966 to clear thirteen square blocks of low rise buildings in Radio Row for construction of the World Trade Center.[37] Groundbreaking for the construction of the World Trade Center took place on August 5, 1966.[38]
The site of the World Trade Center was located on landfill with the bedrock located 65 feet (20 m) below.[39] In order to construct the World Trade Center, it was necessary to build the "bathtub" with a slurry wall along the West Street side of the site, serving to keep water from the Hudson River out.[40] The slurry method devised by Port Authority’s chief engineer, John M. Kyle, Jr., involved digging a trench, and as excavation proceeded, filling the space with a "slurry" mixture composed of bentonite which plugged holes and kept water out. When the trench was dug out, a steel cage was inserted and concrete was poured in, forcing the "slurry" out. It took fourteen months for the slurry wall to be completed; it was necessary before excavation of material from the interior of the site could begin.[41] The 1.2 million cubic yards (917,000 m³) of material excavated were used to expand the Manhattan shoreline across West Street to form Battery Park City (along with other fill and dredge material.)[42][43]
In January 1967, the Port Authority awarded $74 million in contracts to various steel suppliers, and Karl Koch was hired to erect the steel.[44] Tishman Realty & Construction was hired in February 1967 to oversee construction of the project.[45] Construction work began on the North Tower in August 1968; construction on the South Tower was underway by January 1969.[46] The original Hudson Tubes, carrying PATH trains into Hudson Terminal, remained in service as elevated tunnels during the construction process until 1971 when a new PATH station opened.[47]
The topping out ceremony of 1 WTC (North Tower) took place on December 23, 1970, while 2 WTC's ceremony (South Tower) occurred later on July 19, 1971.[46] The first tenants moved into the North Tower in December 1970; the South Tower accepted tenants in January 1972.[48] When the World Trade Center twin towers were completed, the total costs to the Port Authority had reached $900 million.[49] The ribbon cutting ceremony was on April 4, 1973.[50]
Criticism
Plans to build the World Trade Center were not without controversy. The site for the World Trade Center was the location of Radio Row, home to hundreds of commercial and industrial tenants, property owners, small businesses, and approximately 100 residents, many of whom fiercely resisted forced relocation.[51] A group of small businesses affected filed an injunction challenging the Port Authority's power of eminent domain.[52] The case made its way through the court system to the United States Supreme Court; the Court refused to accept the case.[53]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/22/WTC-looking_north-orthogonal.jpg/220px-WTC-looking_north-orthogonal.jpg)
Private real estate developers and members of the Real Estate Board of New York, led by Empire State Building owner Lawrence A. Wien, expressed concerns about this much "subsidized" office space going on the open market, competing with the private sector when there was already a glut of vacancies.[54][55] Others questioned whether the Port Authority really ought to take on a project described by some as a "mistaken social priority."[56]
The World Trade Center design brought criticism of its aesthetics from the American Institute of Architects and other groups.[57][21] Lewis Mumford, author of The City in History and other works on urban planning, criticized the project and described it and other new skyscrapers as "just glass-and-metal filing cabinets."[58] The twin towers' narrow office windows, only 18 inches (460 mm) wide, were disliked by many for impairing the view from the buildings.[20]
The trade center's "superblock", replacing a more traditional, dense neighborhood, was regarded by some critics as an inhospitable environment that disrupted the complicated traffic network typical of Manhattan. For example, in his book The Pentagon of Power, Lewis Mumford denounced the center as an "example of the purposeless giantism and technological exhibitionism that are [sic] now eviscerating the living tissue of every great city."[59] On the other hand, Mr. Yamasaki saw the expanse as a focal point of serenity amidst the chaos of the city.
For many years, the immense Austin J. Tobin Plaza was unwelcoming and often beset by brisk winds at the ground level.[60] In 1999, the outdoor plaza reopened after undergoing $12 million renovations which involved replacing marble pavers with gray and pink granite stones, adding new benches, planters, new restaurants, food kiosks and outdoor dining areas.[61] In later years, the plaza became a center for outdoor concerts and other activities.
Complex
Twin Towers
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/1e/WTC_Building_Arrangement_and_Site_Plan.svg/220px-WTC_Building_Arrangement_and_Site_Plan.svg.png)
With construction of 7 World Trade Center in the 1980s, the World Trade Center had a total of seven buildings but the most notable were the main twin towers which were each 110 stories tall. During a press conference in 1973, Minoru Yamasaki was asked "Why two 110-story buildings? Why not one 220-story building?" His response was: "I didn't want to lose the human scale".[62]
When completed in 1972, 1 WTC became the tallest building in the world, unseating the Empire State Building after a 40-year reign. 1 WTC (the North Tower, which featured a 360-foot (110 m) high TV and radio antenna added in 1978, stood 1,368 feet (417 m) high at the top of the roof. With the 360 ft antenna, the highest point of the North Tower reached 1,727 ft. 2 WTC became the second tallest building in the world when completed in 1973. The observation deck was 1,362 feet (415 m) high.[63] The World Trade Center towers held the height record only briefly. Chicago's Sears Tower, finished in May 1973, reached 1,450 feet (442 m) at the rooftop.[64]
Of the 110 stories, eight were set aside for technical services (mechanical floors) Level B6/B5, Floors 7/8, 41/42, 75/76 and 108/109, in four two-floor areas evenly spaced up the building. All the remaining floors were free for open-plan offices. Each floor of the towers had 40,000 square feet (3,700 m2) of space for occupancy.[17] Each tower had 3.8 million square feet (350,000 m²) of office space. Altogether the entire complex of seven buildings had 11.2 million square feet (1.04 km²) of space.
Initially conceived as a complex dedicated to companies and organizations directly taking part in "world trade," they at first failed to attract the expected clientèle. During the early years, various governmental organizations became key tenants of the World Trade Center including the State of New York. It was not until the 1980s that the city's perilous financial state eased, after which an increasing number of private companies — mostly financial firms tied to Wall Street — became tenants. During the 1990s, approximately 500 companies had offices in the complex including many financial companies such as Morgan Stanley, Aon Corporation, Salomon Brothers and the Port Authority itself. The basement concourse of the World Trade Center included The Mall at the World Trade Center along with a PATH station.
Electrical service to the towers was supplied by Consolidated Edison (ConEd) at 13,800 volts. This service passed through the World Trade Center Primary Distribution Center (PDC) and sent up through the core of the building to electrical substations located on the mechanical floors. The substations "stepped" the 13,800 primary voltage down to 480/277 volt secondary power and further to 120/208 volt general power and lighting service. The complex also was served by emergency generators located in the sublevels of the towers and on the roof of 5 WTC.[65][66]
The 110th Floor of 1 WTC (North Tower) housed commercial and public service radio & television transmission equipment. The roof of 1 WTC contained a vast array of transmission antennas including the 360 ft (approx 110m) center antenna mast rebuilt in 1999 by Dielectric Inc. to accommodate DTV. The center mast contained the television signals for almost all NYC television broadcasters: WCBS-TV 2, WNBC-TV 4, WNYW 5, WABC-TV 7, WWOR-TV 9 Secaucus, WPIX 11, WNET 13 Newark, WPXN-TV 31 and WNJU 47. It also had four NYC FM broadcasters: WPAT-FM 93.1, WNYC 93.9, WKCR 89.9, and WKTU 103.5. Access to the roof was controlled from the WTC Operations Control Center (OCC) located in the B1 level of 2 WTC.
Observation deck
Although most of the space in the World Trade Center complex was off-limits to the public, the South Tower featured a public observation area named "Top Of The World". When visiting the observation deck, visitors would first pass through security checks added after the 1993 World Trade Center bombing[67] then were whisked to the 107th floor indoor observatory at a height of 1,310 feet. The Port Authority renovated the observatory in 1995, then leased it to Ogden Entertainment to operate. Attractions added to the observation deck included a simulated helicopter ride around the city. The food court was designed with a subway car theme.[68][69] Weather permitting, visitors could take two short escalator rides up from the 107th floor to an outdoor viewing platform at a height of 1,377 feet (420 m).[70] On a clear day, visitors could see up to 50 miles in any given direction.[68] An anti-suicide fence was placed on the roof itself, with the viewing platform set back and elevated above it, requiring only an ordinary railing and leaving the view unobstructed, unlike the observation deck of the Empire State Building.[69]
Windows on the World
The North Tower (1 WTC) had a restaurant on the 107th floor called Windows on the World which opened in April 1976. The restaurant was developed by Joe Baum at a cost of more than $17 million.[71] Aside from the main restaurant, two offshoots were located at the top of the North Tower: "Hors d'Oeuvrerie" (offered a Danish smorgasbord during the day and sushi in the evening) and "Cellar in the Sky" (a small wine bar).[72] Windows on the World also had a wine school program run by Kevin Zraly. Windows on the World was closed following the 1993 World Trade Center bombing.[71] Upon reopening in 1996, Hors d'Oeuvrerie and Cellar in the Sky were replaced with the "Greatest Bar on Earth" and "Wild Blue".[72] In 2000, its last full year of operation, Windows on the World reported revenues of $37 million, making it the highest-grossing restaurant in the United States.[73]
Other buildings
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Twin_Towers_from_Empire_State_Building.jpg/220px-Twin_Towers_from_Empire_State_Building.jpg)
Five smaller buildings stood around the 16-acre (65,000 m²) block. One was the 22-floor hotel which opened in 1981 as the Vista Hotel and in 1995 became the Marriott World Trade Center (3 WTC) at the southwest corner of the site. Three low-rise buildings (4 WTC, 5 WTC, and 6 WTC) in the same hollow tube design as the towers also stood around the plaza. 6 World Trade Center, at the northwest corner, housed the United States Customs Service and the U.S. Commodities Exchange. 5 World Trade Center was located at the northeast corner above the PATH station and 4 World Trade Center was at the southeast corner. In 1987, a 47-floor office building called 7 WTC was built north of the block. Beneath the World Trade Center complex was an underground shopping mall which in turn had connections to various mass transit facilities including the New York City Subway system and the Port Authority's own PATH trains connecting Manhattan to Jersey City, Hoboken, and Newark.
One of the world's largest gold depositories was stored underneath the World Trade Center, owned by a group of commercial banks. The 1993 bomb detonated close by but the vault held. Seven weeks after the September 11 attacks, $230 million in precious metals were removed from basement vaults of 4 WTC which included 3,800 100-Troy-ounce registered gold bars and 30,000 1,000-ounce silver bars.[74]
Life and events
On a typical weekday 50,000 people worked in the towers[75] with another 200,000 passing through as visitors.[76] The complex was so large that it had its own zip code: 10048.[77] The towers offered expansive views from the observation deck atop the South Tower and the Windows on the World restaurant on top of the North Tower. The Twin Towers became known worldwide, appearing in numerous movies and television shows as well as on postcards and other merchandise, and became seen as a New York icon, in the same league as the Empire State Building and Statue of Liberty.[78] French high wire acrobatic performer Philippe Petit walked between the towers on a tightrope in 1974,[79] Brooklyn toymaker George Willig scaled the south tower in 1977[80] and Dan Goodwin climbed the North Tower in 1983.[81]
The 1995 PCA world chess championship between Garry Kasparov and Viswanathan Anand was played on the 107th floor of the South Tower.[82] In January 1998, Mafia member Ralph Guarino, who had gained maintenance access to the World Trade Center, arranged a three-man crew for a heist which netted over $2 million from a Brink's delivery to the eleventh floor of the World Trade Center. All four were arrested, and Guarino became an informant for the FBI against the DeCavalcante crime family which operated out of New Jersey.[83]
February 13, 1975 fire
On February 13, 1975, a three-alarm fire broke out on the 11th floor of the North Tower. Fire spread through the core to the 9th and 14th floors by igniting the insulation of telephone cables in a utility shaft that ran vertically between floors. Areas at the furthest extent of the fire were extinguished almost immediately and the original fire was put out in a few hours. Most of the damage was concentrated on the 11th floor, fueled by cabinets filled with paper, alcohol-based fluid for office machines, and other office equipment. Fireproofing protected the steel from melting and there was no structural damage to the tower. Other than the damage caused by the fire, a few floors below suffered water damage from the extinguishing of the fires above. At that time, the World Trade Center had no sprinkler systems.[84][85]
Bombing of February 26, 1993
On February 26, 1993 at 12:17 p.m., a Ryder truck filled with 1,500 pounds (680 kg) of explosives was planted by Ramzi Yousef and detonated in the underground garage of the North Tower.[86] The blast opened a 100 foot (30 m) hole through 5 sublevels with the greatest damage occurring on levels B1 and B2 and significant structural damage on level B3.[87] Six people were killed and 50,000 other workers and visitors were left gasping for air within the 110 story towers. Many people inside the North Tower were forced to walk down darkened stairwells that contained no emergency lighting, some taking two hours or more to reach safety.[88][89]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/10/WTC_1993_ATF_Commons.jpg/220px-WTC_1993_ATF_Commons.jpg)
Yousef fled to Pakistan after the bombing but was arrested in Islamabad in February 1995, and was extradited back to the United States to face trial.[90] Sheikh Omar Abdel Rahman was convicted in 1996 for involvement in the bombing and other plots.[91] Yousef and Eyad Ismoil were convicted in November 1997 for their carrying out the bombing.[92] Four others had been convicted in May 1994 for their involvement in the 1993 bombing.[93] According to a presiding judge, the conspirators' chief aim at the time of the attack was to destabilize the north tower and send it crashing into the south tower, toppling both landmarks.[94]
Following the bombing, floors that were blown out needed to be repaired to restore the structural support they provided to columns.[95] The slurry wall was in peril following the bombing and loss of the floor slabs which provided lateral support to counteract pressure from Hudson River water on the other side. The refrigeration plant on sublevel B5, which provided air conditioning to the entire World Trade Center complex, was heavily damaged.[96] Subsequent to the bombing, the Port Authority installed photoluminescent markings in the stairwells.[97] The fire alarm system for both towers needed to be replaced because critical wiring and signaling in the original system was destroyed.[98] As a memorial to the victims of the bombing of the tower, a reflecting pool was installed with the names of those who had been killed in the blast.[99]
Lease
In 1998, the Port Authority approved plans to privatize the World Trade Center.[100] In 2001, the Port Authority sought to lease the World Trade Center to a private entity. Bids for the lease came from Vornado Realty Trust, a joint bid between Brookfield Properties Corporation and Boston Properties,[101] and a joint bid by Silverstein Properties and The Westfield Group.[102] By privatizing the World Trade Center, it would be added to the city's tax rolls[102] and provide funds for other Port Authority projects.[103] On February 15, 2001, the Port Authority announced that Vornado Trust Realty had won the lease for the World Trade Center, paying $3.25 billion for the 99-year lease.[104] Vornado Realty outbid Silverstein by $600 million though Silverstein upped his offer to $3.22 billion. However, Vornado insisted on last minute changes to the deal, including a shorter 39-year lease which the Port Authority considered nonnegotiable.[105] Vornado later withdrew and Silverstein's bid for the lease to the World Trade Center was accepted on April 26, 2001,[106] and closed on July 24, 2001.[107]
September 11, 2001
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/fd/National_Park_Service_9-11_Statue_of_Liberty_and_WTC_fire.jpg/220px-National_Park_Service_9-11_Statue_of_Liberty_and_WTC_fire.jpg)
On September 11, 2001, al Qaeda suicide hijackers crashed American Airlines Flight 11 into the northern facade of the North Tower at 8:46 a.m., followed seventeen minutes later by a second team of hijackers who crashed United Airlines Flight 175 into the South Tower.[108] The damage caused to the North Tower by Flight 11 destroyed any means of escape from above the impact zone, trapping 1,344 people[109] while as many as 600 people were killed instantly or were trapped at or above the floors of impact in the South Tower.[110] At 9:59 a.m., the South Tower collapsed due to fire which caused steel structural elements, already weakened from the plane impact, to fail. The North Tower collapsed at 10:28, after burning for approximately 102 minutes.[111]
At 5:20 p.m. on September 11, 2001, 7 World Trade Center collapsed due to uncontrolled fires causing structural failure.[112] 3 World Trade Center, a Marriott hotel, was destroyed during the collapse of the two towers. The three remaining buildings in the WTC plaza sustained heavy damage from debris and were ultimately demolished.[113] The Deutsche Bank Building across Liberty Street from the World Trade Center complex was later condemned due to the uninhabitable toxic conditions inside; it is undergoing deconstruction.[114][115] The Borough of Manhattan Community College's Fiterman Hall at 30 West Broadway was also condemned due to extensive damage in the attacks and is slated for deconstruction.[116]
In the aftermath of the attacks, media reports suggested that tens of thousands might have been killed in the attacks, as on any given day upwards of 50,000 people could be inside the towers. Ultimately, 2,750 death certificates were filed relating to the 9/11 attacks, including one filed for Felicia Dunn-Jones who was added to the official death toll in May 2007; Dunn-Jones died five months after 9/11 from a lung condition linked to exposure to dust during the collapse of the World Trade Center.[117] Cantor Fitzgerald L.P., an investment bank on the 101st–105th floors of One World Trade Center, lost 658 employees, considerably more than any other employer,[118] while Marsh & McLennan Companies, located immediately below Cantor Fitzgerald on floors 93–101 (the location of Flight 11's impact), lost 295 employees, and 175 employees of Aon Corporation were killed.[119] As well, 343 deaths were New York City firefighters, 84 were Port Authority employees, of whom 37 were members of the Port Authority Police Department, and another 23 were New York City Police Department officers.[120][121][122] Of all the people who were still in the towers when they collapsed, only 20 were pulled out alive.[123]
Rebuilding
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World Trade Center |
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Towers |
Other elements |
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History |
The process of cleanup and recovery continued 24 hours a day and took eight months. Debris was transported from the World Trade Center site to Fresh Kills on Staten Island, where it was further sifted. On May 30, 2002, a ceremony was held to officially mark the end of the cleanup efforts.[124] In 2002, ground was broken on construction of a new 7 World Trade Center building located just to the north of the main World Trade Center site. Since it was not part of the site master plan, Larry Silverstein was able to proceed without delay on the rebuilding of 7 World Trade Center which was completed and officially opened in May 2006.[125][126][127] A temporary PATH station at the World Trade Center opened in November 2003; it will be replaced by a permanent station designed by Santiago Calatrava.[128]
With the main World Trade Center site, numerous stakeholders were involved including Silverstein and the Port Authority which in turn meant that the Governor of New York State, George Pataki, had some authority. As well, the victims' families, people in the surrounding neighborhoods, Mayor Michael Bloomberg and others wanted input. Governor Pataki established the Lower Manhattan Development Corporation (LMDC) in November 2001 as an official commission to oversee the rebuilding process.[129] The LMDC held a competition to solicit possible designs for the site. The Memory Foundations design by Daniel Libeskind was chosen as the master plan for the World Trade Center site.[130] The plan included the 1,368-foot (541 m) Freedom Tower as well as a memorial and a number of other office towers. Out of the World Trade Center Site Memorial Competition, a design by Michael Arad and Peter Walker entitled Reflecting Absence was selected in January 2004.[131]
On March 13, 2006, workers arrived at the World Trade Center site to remove remaining debris and start surveying work. This marked the official start of construction of the National September 11 Memorial & Museum, though not without controversy and concerns from some family members.[132] In April 2006, the Port Authority and Larry Silverstein reached an agreement in which Silverstein ceded rights to develop the Freedom Tower and Tower Five in exchange for financing with Liberty Bonds for Towers Two, Three, and Four.[133][134] On April 27, 2006, a ground-breaking ceremony was held for the Freedom Tower.[135]
In May 2006, architects Richard Rogers and Fumihiko Maki were announced as the architects for Towers Three and Four, respectively.[136] The final designs for Towers Two, Three and Four were unveiled on September 7, 2006. Tower Two, or 200 Greenwich Street, will have a roof height of 1,254 feet (382 m) and a 96-foot (29 m) tripod spire for a total of 1,350 feet (411 m). Tower Three, or 175 Greenwich Street will have a roof height of 1,155 feet (352 m) and an antennae height reaching 1,255 feet (383 m). Tower Four, or 150 Greenwich Street, will have an overall height of 946 feet (288 m).[137] On June 22, 2007 the Port Authority of New York and New Jersey announced that JP Morgan Chase will build Tower 5, a 42-story building on Site 5 currently occupied by the Deutsche Bank Building,[138] and Kohn Pedersen Fox was selected as the architect for the building.[139]
Film and media
The World Trade Center was an iconic structure and has been featured in numerous films as well as appearing in many television shows, cartoons, comic books, video games and music videos. Portions of Godspell were filmed at the top of the World Trade Center as the building was nearing completion.[140] The final scene of the 1976 film King Kong took place at the World Trade Center instead of the Empire State Building where the scene had taken place in the original film.[141] The events surrounding the September 11 attacks were portrayed in several documentaries and movies, including two major motion pictures made in 2006: Oliver Stone's World Trade Center and Paul Greengrass' United 93.[142][143] Several movies released shortly after 9/11 digitally erased the Twin Towers from skyline shots; one such was Spider-Man.[144] As of 2008[update], most networks airing reruns of popular television shows have chosen to leave the Twin Towers alone such as in establishing shots in Friends and in episodes of The Simpsons. An exception to this was the opening montage of HBO's Sex and The City within which producers removed shots of the Towers as a mark of respect for the victims of 9/11.[145]
Notes
- ^ Holusha, John (2002-01-06). "Commercial Property; In Office Market, a Time of Uncertainty". The New York Times. Retrieved 2008-11-21.
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(help) - ^ "Dewey Picks Board for Trade Center". The New York Times. 1946-07-06.
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(help) - ^ "Lets Port Group Disband, State Senate for Dissolution of World Trade Corporation". The New York Times. 1949-03-11.
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(help) - ^ Gillespie (1999), pp. 32–33
- ^ Gillespie (1999), pp. 34–35
- ^ Gillespie (1999), p. 38
- ^ a b Grutzner, Charles (1961-12-29). "Port Unit Backs Linking of H&M and Other Lines". The New York Times.
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(help) - ^ Cudahy (2002), p. 56
- ^ Wright, George Cable (January 23, 1962). "2 States Agree on Hudson Tubes and Trade Center". The New York Times.
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(help) - ^ Smith, Terence (1966-08-04). "City Ends Fight with Port Body on Trade Center". The New York Times.
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(help) - ^ Smith, Terence (1967-01-26). "Mayor Signs Pact on Trade Center". The New York Times.
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(help) - ^ Esterow, Milton (1962-09-21). "Architect Named for Trade Center". The New York Times.
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(help) - ^ a b Huxtable, Ada Louise (1964-01-19). "A New Era Heralded". The New York Times.
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(help) - ^ a b Huxtable, Ada Louise (1964-01-26). "Biggest Buildings Herald New Era". The New York Times.
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(help) - ^ Lew, H.S., Richard W. Bukowski, Nicholas J. Carino (September 2005). "Design, Construction, and Maintenance of Structural and Life Safety Systems (NCSTAR 1-1)" (PDF). National Institute of Standards and Technology. pp. p. 9.
{{cite web}}
:|pages=
has extra text (help)CS1 maint: multiple names: authors list (link) - ^ Gillespie (1999), pp. 75–78
- ^ a b Ruchelman (1977), p. 11
- ^ Gillespie (1999), p. 76
- ^ NIST NCSTAR 1-1 (2005), p. 7
- ^ a b Pekala, Nancy (2001-11-01). "Profile of a lost landmark; World Trade Center". Journal of Property Management.
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(help) - ^ a b Huxtable, Ada Louise (1966-05-29). "Who's Afraid of the Big Bad Buildings". The New York Times.
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(help) - ^ Darton (1999), p. 32–34
- ^ Nobel, Philip (2005). Sixteen Acres: Architecture and the Outrageous Struggle for the Future of Ground Zero. Macmillan. pp. p. 54. ISBN 0805080023.
{{cite book}}
:|pages=
has extra text (help) - ^ NIST NCSTAR 1 (2005), p. 1
- ^ a b c NIST NCSTAR 1-1 (2005), pp. 40–42 Cite error: The named reference "ncstar1-1-p10" was defined multiple times with different content (see the help page).
- ^ NIST NCSTAR 1 (2005), p. 8
- ^ NIST NCSTAR 1 (2005), pp. 8–9
- ^ NIST NCSTAR 1 (2005), p. 10
- ^ NIST NCSTAR 1 (2005), p. 10
- ^ "New York: A Documentary Film - The Center of the World (Construction Footage)". Port Authority / PBS. Retrieved 2007-05-16.
- ^ NIST NCSTAR 1 (2005), p. 10
- ^ Glanz and Lipton (2003), p. 138
- ^ NIST NCSTAR 1-1A (2005), p. 65
- ^ Glanz and Lipton (2003), p. 139-144
- ^ Glanz and Lipton (2003), p. 160-167
- ^ Ingraham, Joseph C. (1965-03-29). "Port Agency Buys Downtown Tract". The New York Times.
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(help) - ^ Gillespie (1999), p. 61
- ^ Federal Emergency Management Agency (2002). "Chapter 1". World Trade Center Building Performance Study.
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: Unknown parameter|month=
ignored (help) - ^ Iglauer, Edith (1972-11-04). "The Biggest Foundation". The New Yorker.
- ^ Kapp, Martin S (1964-07-09). "Tall Towers will Sit on Deep Foundations". Engineering News Record.
{{cite news}}
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(help) - ^ Gillespie (1999), p. 68
- ^ Gillespie (1999), p. 71
- ^ "New York Gets $90 Million Worth of Land for Nothing". Engineering News Record. 1968-04-18.
{{cite news}}
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(help) - ^ "Contracts Totaling $74,079,000 Awarded for the Trade Center". The New York Times. 1967-01-24.
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(help) - ^ Kihss, Peter (1967-02-27). "Trade Center Job To Go To Tishman". The New York Times.
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(help) - ^ a b "Timeline: World Trade Center chronology". PBS - American Experience. Retrieved 2007-05-15.
- ^ Carroll, Maurice (1968-12-30). "A Section of the Hudson Tubes is Turned into Elevated Tunnel". The New York Times.
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(help) - ^ NIST NCSTAR 1-1, p. xxxvi
- ^ Cudahy (2002), p. 58
- ^ Gillespie (1999), p. 134
- ^ Gillespie (1999), pp. 42–44
- ^ Clark, Alfred E. (1962-06-27). "Injunction Asked on Trade Center". The New York Times.
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(help) - ^ Arnold, Martin (1963-11-13). "High Court Plea is Lost by Foes of Trade Center". The New York Times.
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(help) - ^ Gillespie (1999), pp. 49–50
- ^ Knowles, Clayton (1964-02-14). "New Fight Begun on Trade Center". The New York Times.
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(help) - ^ "Kheel Urges Port Authority to Sell Trade Center". The New York Times. 1969-11-12.
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(help) - ^ Steese, Edward (1964-03-10). "Marring City's Skyline". The New York Times.
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(help) - ^ Whitman, Alden (1967-03-22). "Mumford Finds City Strangled By Excess of Cars and People". The New York Times.
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(help) - ^ Mumford, Lewis (1970). The Pentagon of Power. Harcourt Brace Jovanovich. p. p. 342. ISBN 0151639744.
{{cite book}}
:|page=
has extra text (help) - ^ Dunlap, David W (2006-12-07). "At New Trade Center, Seeking Lively (but Secure) Streets". The New York Times.
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(help) - ^ "World Trade Center Plaza Reopens with Summer-long Performing Arts Festival". PANYNJ. 1999-06-09.
- ^ "1973: World Trade Center Is Dynamic Duo of Height". Engineering News-Record. 1999-08-16. Archived from the original on 2002-06-11.
- ^ "World Trade Center, New York City". Emporis. Retrieved 2006-04-13.
- ^ "Sears Tower Building Information". Retrieved 2008-12-01.
- ^ "World Trade Center Building Performance Study" (PDF). FEMA. Retrieved 2007-03-08.
Six 1,200-kilowatt(kW) emergency power generators located in the sixth basement (B-6) level provided a secondary power supply.
- ^ Fischbach, Amy Florence (January 1, 2001). "Towering security". CEE News. Retrieved 2007-03-08.
E-J Electric set four generators on the roof of Tower 5, which was nine stories, as opposed to the 110-story Towers 1 and 2. E-J then ran high-voltage feeder cable to Towers 1, 2, 4 and 5, installed three substations and distributed power to the tenants.
- ^ Onishi, Norimitsu (1997-02-24). "Metal Detectors, Common at Other City Landmarks, Are Not Used". The New York Times. Retrieved 2008-11-21.
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(help) - ^ a b McDowell, Edwin (1997-04-11). "At Trade Center Deck, Views Are Lofty, as Are the Prices". The New York Times. Retrieved 2008-11-21.
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(help) - ^ a b Darton (1999), p. 152
- ^ Adams, Arthur G. (1996). The Hudson River Guidebook. Fordham University Press. pp. p. 87. ISBN 0823216799.
{{cite book}}
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has extra text (help) - ^ a b Zraly, Kevin (2006). Windows on the World Complete Wine Course. Sterling Publishing Company. pp. p. 260. ISBN 1402726392.
{{cite book}}
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has extra text (help) - ^ a b Grimes, William (2001-09-19). "Windows That Rose So Close To the Sun". The New York Times.
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(help) - ^ Greenhouse, Steven (2002-06-04). "Windows on the World Workers Say Their Boss Didn't Do Enough". The New York Times.
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(help) - ^ Rediff.com. Reuters, November 17, 2001: Buried WTC gold returns to futures trade Accessed December 1, 2008.
- ^ Darton (1999), p. 204
- ^ Darton (1999), p. 8
- ^ Olshan, Jeremy (2003-02-04). "'Not Deliverable';Mail still says 'One World Trade Center'". Newsday (New York).
- ^ Gillespie (1999), p. 5
- ^ Glanz and Lipton (2003), p. 219
- ^ Gillespie (1999), p. 149
- ^ Morrison, Dan (1997-11-12). "His Tower Climb Comes Up Short". Newsday.
- ^ Byrne, Robert. "Kasparov Gets Pressure, but No Victory". The New York Times. Retrieved 2008-11-21.
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(help) - ^ Reppetto, Thomas (2007). Bringing Down the Mob: The War Against the American Mafia. Macmillan. pp. p. 279. ISBN 0805086595.
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has extra text (help) - ^ "Trade Center Hit by 6-Floor Fire". The New York Times. 1975-02-14. Retrieved 2008-09-11.
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(help) - ^ "The Emergency Response Operations" (PDF). Federal Building and Fire Safety Investigation of the World Trade Center Disaster. NIST. 2005. Retrieved 2008-09-11.
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ignored (help) - ^ Reeve (1999), p. 10
- ^ Lew, H.S., Richard W. Bukowski, Nicholas J. Carino (2005). Design, Construction, and Maintenance of Structural and Life Safety Systems (NCSTAR 1-1). National Institute of Standards and Technology. pp. p. xlv.
{{cite book}}
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has extra text (help); Unknown parameter|month=
ignored (help)CS1 maint: multiple names: authors list (link) - ^ Mathews, Tom (1993-03-08). "A Shaken City's Towering Inferno". Newsweek. Retrieved 2008-10-26.
- ^ Barbanel, Josh (1993-02-27). "Tougher Code May Not Have Helped". The New York Times. Retrieved 2008-11-20.
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(help) - ^ Johnston, David (1995-02-09). "Fugitive in Trade Center Blast Is Caught and Returned to U.S." The New York Times. Retrieved 2008-11-20.
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(help) - ^ Fried, Joseph P. (1996-01-18). "Sheik Sentenced to Life in Prison in Bombing Plot". The New York Times. Retrieved 2008-11-20.
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(help) - ^ "Jury convicts 2 in Trade Center blast". CNN. 1997-11-12. Retrieved 2008-11-20.
- ^ Hays, Tom and Larry Neumeister (1994-05-25). "In Sentencing Bombers, Judge Takes Hard Line". Seattle Times / AP. Retrieved 2008-11-20.
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- ^ Port Authority Risk Management Staff. "The World Trade Center Complex" (PDF). United States Fire Administration. Retrieved 2007-05-15.
- ^ Ramabhushanam, Ennala and Marjorie Lynch. "Structural Assessment of Bomb Damage for World Trade Center". Journal of Performance of Constructed Facilities. 8(4): 229–242.
- ^ Amy, Jr., James D. (December 2006). "Escape from New York - The Use of Photoluminescent Pathway-marking Systems in High-Rise". Emerging trends. Issue 8. Society of Fire Protection Engineer. Retrieved 2008-11-20.
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has extra text (help)CS1 maint: multiple names: authors list (link) - ^ Evans, David D., Richard D. Peacock, Erica D. Kuligowski, W. Stuart Dols, William L. Grosshandler (2005). Active Fire Protection Systems (NCSTAR 1-4) (PDF). National Institute of Standards and Technology. pp. p. 44.
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ignored (help)CS1 maint: multiple names: authors list (link) - ^ Dwyer, Jim (2002-02-26). "Their Monument Now Destroyed, 1993 Victims Are Remembered". The New York Times. Retrieved 2008-11-20.
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(help) - ^ Herman, Eric (2001-02-06). "PA to ease WTC tax load, rent would be cut to offset hike by city". New York Daily News.
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(help) - ^ Bagli, Charles V. (2001-01-31). "Bidding for Twin Towers". The New York Times. Retrieved 2008-11-20.
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(help) - ^ "9/11 Commission Report". The National Commission on Terrorist Attacks Upon the United States.
- ^ Dwyer, Jim (2002-05-26). "102 Minutes: Last Words at the Trade Center; Fighting to Live as the Towers Die". The New York Times. Archived from the original on 2008-10-10. Retrieved 2008-05-23.
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suggested) (help) - ^ Lipton, Eric (2004-07-22). "Study Maps the Location of Deaths in the Twin Towers". The New York Times. Retrieved 2008-04-22.
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(help) - ^ NIST NCSTAR 1-1 (2005), p. 34; pp. 45–46
- ^ "Final Report on the Collapse of World Trade Center Building 7 - Draft for Public Comment" (PDF). NIST. 2008. pp. xxxii.
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: Unknown parameter|month=
ignored (help) - ^ "World Trade Center Building Performance Study". FEMA. 2002. Retrieved 2007-07-12.
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ignored (help) - ^ "World Trade Center Building Performance Study - Bankers Trust Building" (PDF). FEMA. 2002. Retrieved 2007-07-12.
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ignored (help) - ^ "The Deutsche Bank Building at 130 Liberty Street". Lower Manhattan Construction Command Center. Retrieved 2007-07-12.
- ^ "Fiterman Hall - Project Updates". Lower Manhattan Construction Command Center. Retrieved 2008-11-19.
- ^ DePalma, Anthony (2007-05-24). "For the First Time, New York Links a Death to 9/11 Dust". The New York Times.
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- ^ Siegel, Aaron (2007-09-11). "Industry honors fallen on 9/11 anniversary". InvestmentNews. Retrieved 2008-05-20.
- ^ Denise Grady (2002-09-10). "Lung Ailments May Force 500 Firefighters Off Job". The New York Times. Retrieved 2008-05-23.
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(help) - ^ "Police back on day-to-day beat after 9/11 nightmare". CNN. 2002-07-21. Retrieved 2008-05-23.
- ^ Denerstein, Robert (2006-08-04). "Terror in close-up". Rocky Mountain News. Retrieved 2008-11-19.
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(help) - ^ "Ceremony closes 'Ground Zero' cleanup". CNN. 2002-05-30. Retrieved 2008-09-11.
- ^ Bagli, Charles V. (2002-01-31). "Developer's Pace at 7 World Trade Center Upsets Some". The New York Times. Retrieved 2008-02-17.
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(help) - ^ "7 World Trade Center Opens with Musical Fanfare". Lower Manhattan Development Corporation (LMDC). 2006-05-22. Retrieved 2007-07-27.
- ^ "Major Step at Ground Zero: 7 World Trade Center Opening". Architectural Record. 2006-05-17. Retrieved 2008-02-17.
- ^ "Urban Design and Visual Resources (Chapter 7)" (PDF). Permanent WTC Path Terminal Final Environmental Impact Statement and Section 4(f) Evaluation. Port Authority of New York and New Jersey. May 2005. Retrieved 2008-11-19.
- ^ Pérez-Peña, Richard (2001-11-03). "State Plans Rebuilding Agency, Perhaps Led by Giuliani". The New York Times. Retrieved 2008-11-19.
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(help) - ^ Lower Manhattan Development Corporation. "Selected Design for the WTC Site as of February 2003". Retrieved 2008-11-19.
- ^ Collins, Glenn and David W. Dunlap (2004-01-15). "Unveiling of Memorial Reveals a Wealth of New Details". The New York Times. Retrieved 2008-11-19.
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(help) - ^ Katersky, Aaron (2006-03-13). "Construction on Ground Zero Memorial Ignites Protests". ABC News. Retrieved 2008-11-19.
- ^ Dunlap, David W. (2006-04-28). "Freedom Tower Construction Starts After the Beginning". The New York Times. Retrieved 2008-11-19.
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(help) - ^ Todorovich, Petra (2006-03-24). "At the Heart of Ground Zero Renegotiations, a 1,776-Foot Stumbling Block". Spotlight on the Region. 5(6). Regional Plan Association. Retrieved 2008-11-19.
- ^ Westfeldt, Amy (2006-04-28). "Construction Begins at Ground Zero". Washington Post / AP. Retrieved 2008-11-19.
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(help) - ^ Pogrebin, Robin (2006-05-03). "Richard Rogers to Design Tower at Ground Zero". The New York Times. Retrieved 2008-11-19.
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(help) - ^ Dunlap, David W. (2006-09-07). "Designs Unveiled for Freedom Tower's Neighbors". The New York Times. Retrieved 2008-11-19.
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(help) - ^ Bagli, Charles V. (2007-06-14). "Chase Bank Set to Build Tower by Ground Zero". The New York Times. Retrieved 2008-11-19.
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(help) - ^ Appelbaum, Alec (2007-07-30). "Kohn Responds to WTC5 Criticisms". Architectural Record. Retrieved 2008-11-19.
- ^ Padget, Jonathan (2006-09-03). "When 'Godspell' Was on Top of the World". The Washington Post. Retrieved 2008-11-22.
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(help) - ^ "The King Leaks". Time Magazine. 1976-08-30. Retrieved 2008-11-22.
- ^ Denby, David (2006-05-01). "Last Impressions - "United 93" and "The Death of Mr. Lazarescu"". The New Yorker. Retrieved 2008-11-22.
- ^ Denby, David (2006-08-21). "On Duty - World Trade Center". The New Yorker. Retrieved 2008-11-22.
- ^ Broder, David S. (2002-06-02). "Spider-Man swings too close to reality". Seattle Times. Retrieved 2008-11-22.
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(help) - ^ Oldenburg, Ann (2002-07-18). "Breaking down 'Sex and the City'". USA Today. Retrieved 2008-11-22.
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(help)
References
- Cudahy, Brian J. (2002). Rails Under the Mighty Hudson. Fordham University Press. ISBN 0823221903.
- Darton, Eric (1999). Divided We Stand: A Biography of New York's World Trade Center. Basic Books. ISBN 0465017274.
- Fanella, David A., Arnaldo T. Derecho, S.K. Ghosh (September 2005). Design and Construction of Structural Systems (NCSTAR 1-1A) (PDF). Final Report on the Collapse of the World Trade Center Towers. National Institute of Standards and Technology (NIST).
{{cite book}}
: CS1 maint: multiple names: authors list (link) - Gillespie, Angus K. (1999). Twin Towers: The Life of New York City's World Trade Center. Rutgers University Press. ISBN 0813527422.
- Glanz, James and Eric Lipton (2003). City in the Sky. Times Books. ISBN 0805074287.
- Lew, H.S., Richard W. Bukowski, Nicholas J. Carino (September 2005). Design, Construction, and Maintenance of Structural and Life Safety Systems (NCSTAR 1-1) (PDF). Final Reports of the Federal Building and Fire Investigation of the World Trade Center Disaster. National Institute of Standards and Technology (NIST).
{{cite book}}
: CS1 maint: multiple names: authors list (link) - Reeve, Simon (1999). The New Jackals: Ramzi Yousef, Osama bin Laden and the Future of Terrorism. Northeastern University Press. ISBN 1555535097.
- Ruchelman, Leonard I. (1977). The World Trade Center: Politics and Policies of Skyscraper Development. Syracuse University Press. ISBN 0815621809.
- National Construction Safety Team (September 2005). Federal Building and Fire Safety Investigation of the World Trade Center Disaster (NCSTAR 1-6) (PDF). Structural Fire Response and Probable Collapse Sequence of the World Trade Center Towers. National Institute of Standards and Technology (NIST).
- "World Trade Center Building Performance Study". Federal Emergency Management Agency. 2002.
{{cite web}}
: Unknown parameter|month=
ignored (help)
External links
![](http://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)
- World Trade Center - Silverstein Properties
- Downtown Restoration Program - Port Authority of New York & New Jersey
- National September 11 Memorial & Museum at the World Trade Center
- DMOZ directory - World Trade Center
40°42′42″N 74°00′45″W / 40.71167°N 74.01250°W
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- 1972 architecture
- 1973 architecture
- Office buildings in Manhattan
- Demolished buildings and structures
- Destroyed landmarks
- Former buildings and structures of New York City
- History of New York City
- Port Authority of New York and New Jersey
- September 11 attacks
- Skyscrapers in New York City
- Skyscrapers over 350 meters
- World Trade Centers
- World Trade Center
- Former world's tallest buildings
- Collapsed buildings in the United States