The Cheyenne Mountain Operations Center (CMOC), typically referred to as the Cheyenne Mountain Complex or just Cheyenne Mountain, was a massive construction effort. Placed 1,500 feet underground ...

The 721st was a unit given the sole job of maintaining Cheyenne Mountain Air Force ... the wing’s commander said in a statement. The mountain complex was built at the height of the Cold War ...

Helen H. Richardson, The Denver Post By Billie Stanton Anleu, The Gazette Colorado Springs is undertaking a $500,000 study of the enormous Cheyenne Mountain landslide complex, nearly 1½ years ...