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The 'Most Secure Place on Earth': Top secret NORAD base buried deep inside Cheyenne Mountain opens its 23-ton blast doors as the Cold War relic reinvents itself for the 21st century (24 Pics)


  • The warren of tunnels blasted from mountain granite is known to some as the most secure place on earth 
  • Built in Cold War to monitor Soviet threats and ensure central command could not be wiped out by attack
  • North American Aerospace Defense Command still uses site to keep track of states including North Korea



  •  These 23-ton blast doors defend what it known as the most secure place on earth - a warren of tunnels blasted out of Colorado granite in the 1960s teeming with high-tech surveillance and monitoring equipment

     Canadian Air Force Colonel Travis Morehen said the site is still a vital part of US-Canadian missile defenses a quarter century after the end of the Cold War

    The granite and steel doors also protect electronics from destructive pulses of electro-magnetic energy that nuclear explosions produce

    The top-secret NORAD base inside the Cheyenne Mountain in Colorado opened its doors for a rare tour on May 12, when these photos were taken. The base remains in action a quarter-century after the end of the Cold War

    The bunker lies 2,000 feet under Cheyenne Mountain outside Colorado Springs. It can be sealed off by two of its giant blast doors made of concrete and steel (pictured)

    NORAD called off its 'nuclear watch' in 1992 after the Soviet Union disintegrated, but its high-tech computer rooms are still monitoring threats to the US around the clock - including, despite the recent detente, Kim Jong-Un's North Korea

    The Cheyenne Mountain facility was completed on February 8, 1966, and serves as NORAD's secondary headquarters after the Peterson Air Force Base in El Paso County

    12 May the 60th anniversary of the site's owners, the North American Aerospace Defense Command, a bi-national organization created by the US and Canada to protect the skies over both nations

     The heart of the complex is a grid of six tunnels up to 40 feet wide and three stories high. They hold 15 connected buildings made of steel plates, riding on massive coil springs to absorb the shock of a nuclear blast or earthquake

    The military put NORAD in Colorado because it is near the center of the continent, far from Soviet bomber bases and missile launchers, said Brian Laslie, the organization's deputy historian. Pic: A truck parked at the tunnels' entrance

    These massive coil springs that support buildings inside the Cheyenne Mountain Air Force Station complex near Colorado Springs


    The base monitors North Korea with the same intensity that it did at the height of the state's missile testing program, receiving three or four intelligence reports from the country every day


    The electronic back-end of one of giant blast doors that can be used to seal off the site if a nuclear warhead detonates. It takes 45 seconds for built-in hydraulic machinery to close the doors. If the hydraulics fail, two people can close them by hand


    NORAD regularly launches fighter jets to intercept private aircraft that stray into restricted airspace, including areas where the president is traveling. It is usually a civilian who did not read official warnings. Pictured: A tunnel entrance at the site


    Deputy site director Steve Rose 
    and Royal Canadian Air Force Colonel Travis Morehen speak with reporters during the rare tour

    The main room is surprisingly small, about 40 feet square. Eight big video screens line the walls. Soft lighting, muted colors and sound-muffling surfaces give the room a hushed, somber feel


    A Royal Canadian Air Force CF-101 Voodoo jet intercepting a Soviet Union TU-95 Bear Bomber flying near the buffer zone that NORAD monitors around the North American continent. 


    A NORAD operative watches the skies over Alaska in an undated image. In 1979 and 1980, NORAD computer glitches produced false alarms about incoming missiles. Each time, the problem was discovered quickly


    Another map showing areas hit by a pretend nuclear attack in an undated image taken during the Cold War between the USA and the USSR


    A map showing areas hit by a mock nuclear attack during a military exercise at Cheyenne Mountain during the dangerous days of the Cold War. Photo undated


    The main battle staff position in the Combat Operations Center at Cheyenne Mountain in an undated photo taken during the Cold War era


    This image, taken on December 16, 1966, shows the huge blast doors at the NORAD Cheyenne Mountain site shortly after it opened


    This undated photo from inside the Cheyenne Mountain Complex during the Cold War era shows two officials in front of a map showing the route space satellites take when they circuit the globe

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