Rogue soldiers seize the UN complex in New York and demand a hefty ransom for the release of their diplomatic hostages (including Hood's daughter, Harleigh). Now it's personal, and Hood has returned to Op-Center to save his daughter.
Op-Center seeks the help of their Russian counterpart in tracking the legendary assassin, The Harpooner. Meanwhile, Paul Hood is called in when it appears the President might be undergoing a mental breakdown.
Op-Center is under new management as Paul Hood is reassigned to a Pennsylvania Ave. appointment. At the same time, bombings in Charleston, Durban, and Taiwan, may signify the outing of a feud within the Chinese government.
When terrorists blow up NFL stadiums across the country, the President of the United States charters a new Op-Center for the 21st Century. Admiral Chase Williams is the new director, (Paul Hood at this time is diagnosed with ALS) and must also stop another plot involving a renegade Saudi prince from manipulating America into attacking Syria and launching a war against Iran.
A high-ranking North Korean general is murdered and a U.S. Navy ship is attacked and grounded during a training exercise. Op-Center discovers a secret alliance between China and North Korea, and must quickly rescue the crew in time as well as stop a terrorist cell being unleashed on the American homeland in order to prevent World War III.
National Crisis Management Center (Op-Center)
Although familiarly called "Op-Center", the actual name of the largely autonomous agency is the "National Crisis Management Center". The charter of the NCMC, or Op-Center, is unlike any other in the history of the United States. They handle both domestic and international crises. Director Paul Hood reports to the president himself, and what had started as "an information clearinghouse with SWAT capabilities" now has the singular capacity to monitor, initiate, and manage operations worldwide. The organization had its own paramilitary response team, called the Striker team, named by an Op-Center member who was a soccer fan, composed of members of the U.S. military special operations community. The series also mentioned similar organizations from England, whose response team was called Bengal, and Russia, with a team called Hammer. It is headquartered in a nondescript, two-story building located near the Naval Reserve flight line at Andrews Air Force Base that used to be a ready room, a staging area for crack flight crews. In the event of a nuclear attack, it would have been their job to evacuate key officials from Washington, D.C.
According to the 2014 reboot franchise, the NCMC was eventually disbanded after the Secretary of Defense and the Director of National Intelligence managed to convince the President of the United States to shut the organization down due to the effectiveness of the US Intelligence Community and Special Forces in the War on Terror (much to the disgust of Paul Hood and Mike Rogers). Years later however, terrorists blow up several NFL stadiums across the country and leave thousands dead or mutilated. It is determined in the resulting investigation that the inability of government agencies to prevent the attacks was due to a lack of information, as well as the inability to put the pieces together in time. In response, the President executes an emergency order that reboots Op-Center for the 21st Century. Retired Admiral Chase Williams is eventually named the new director and Op-Center's new headquarters is located in the basement of the National Geospatial Intelligence Agency; as its response team, Op-Center utilizes soldiers from the Joint Special Operations Command.
The third Op-Center novel, Games of State, briefly alludes to the concept of a "Net Force". This concept was later expanded into its own Net Force series, created by the same men as Op-Center but written by Steve Perry (and later cowritten with Larry Segriff). No direct connection has yet been drawn between the two series, however.