Deep Underground Command Center
The Deep Underground Command Center (DUCC) was a United States military installation that was proposed on January 31, 1962,:317 to be "a very deep underground center close to the Pentagon, perhaps 3,000-4,000 feet down, protected to withstand direct hits by high-yield weapons and endure about 30 days in a post-attack period".:318 The DUCC would have been built as "an austere 50-man … or an expanded 300-man version (with the former built to permit expansion into the latter, if desired)".:318–9 Based on Strategic Air Command's Deep Underground Support Center (DUSC) planned near the Cheyenne Mountain nuclear bunker,:363 the DUCC plan was recommended to President John F. Kennedy for fiscal year 1965 funding shortly before his assassination,:318,364 but the underground DUCC, SAC's DUSC, and NORAD's Super Combat Centers were never built. Other contemporary underground installations did see upgrades, such as the 1953 Site R which was "hardened further to about 140 psi blast resistance by 1963",:315 or completion, such as the NORAD's Canadian bunker in 1963, and NORAD's Combat Operations Center & Space Defense Center in the Cheyenne Mountain bunker became operational in 1966.
- Ponturo, J., (June 1975). Wainstein, L. (Project Leader), eds. The Evolution of U.S. Strategic Command and Control and Warning: Part Three (1961–1967) (PDF) (Report). Study S-467. Institute for Defense Analyses. pp. 267–370. Retrieved 2015-06-26.