Cheyenne Mountain Complex, a prominent icon of the Cold War, will soon be re-opened by the Pentagon. The "self-sufficient town" was buried beneath the Rocky Mountains in order to make the facility safe from an attack by Russia.
The Cheyenne Mountain Complex was reportedly built to withstand a nuclear attack by the Soviet Union. The North American Aerospace Command - NORAD, called the Rocky Mountains complex home. Staffers at the government complex were on constant alert while scanning the skies for the presence of Russian missiles. World War 3 concerns kept the Cheyenne Mountain Complex filled with activity until a decade ago when federal officials declared that Russia was "no longer a threat."