The Cheyenne Mountain Complex dates back to the height of the Cold War and was built to withstand Soviet nuclear attacks.

After $3.6 million and months worth of work, the underground Cheyenne Mountain Operations Center is ready for the monsoon. The main entrance to the secretive underground complex was blocked by up to ...

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 ...

The NORAD Cheyenne Mountain Complex dates back to the height of the Cold War. Initially meant for defense against long-range Soviet bombers, it now provides backup and training. The self-sufficient ...