Hidden inside Cheyenne Mountain Complex is one of America’s most heavily protected military facilities. Once viewed as a relic of the Cold War, the underground complex returned to active use as new ...

Carved deep into the granite of Colorado’s Front Range lies one of America’s most secretive Cold War creations: the Cheyenne ...

Deep inside a Colorado mountain lurks a remnant of the Cold War era. Buried 2,000 feet beneath Cheyenne Mountain is a secret military complex, where 15 buildings can seal themselves off from the rest ...

Getting your Trinity Audio player ready... The U.S. military’s mountain bunker along Colorado’s Front Range, built during the Cold War to survive a Soviet nuclear attack, now must withstand scrutiny ...