Cheyenne Mountain is a Mountain located on the southwest side of Colorado Springs, Colorado, USA, and is home to the Cheyenne mountain Air Force Station[1] and its Cheyenne Mountain Directorate, formerly known as the Cheyenne mountain Operations Center (CMOC).
During its Cold War-era reign, the Cheyenne Mountain Operations Center collected data from a worldwide system of satellites, radars, and other sensors and processed that information in real-time. Operations were conducted 24 hours a day, 365 days a year in the Air Warning Center, Missile Warning Center, Space Control Center, Operational Intelligence Watch, Systems Center, Weather Center, and the Command Center.
While most of the day-to-day operations have since moved to nearby Peterson Air Force Base, NORAD still maintains the Cheyenne Mountain Directorate for use in the event of an emergency.
The facility is one of the most unusual installations in the world - apart from the fact that it is housed 2,000 feet (600 m) underground, it is also remarkable in that it was a joint and bi-national military organization comprising over 200 men and women from the Army, Navy, Marine Corps, Air Force, and Canadian Forces.
The mountain is also home to several civilian facilities, including the Cheyenne Mountain Zoo and the Will Rogers Shrine of the Sun.
http://en.wikipedia.org/wiki/Cheyenne_Mountain