NORAD North American Aerospace Defense Command
The North American Aerospace Defense Command (NORAD) is a binational United States and Canadian organization charged with the missions of aerospace warning and aerospace control for North America. Aerospace warning includes the monitoring of man-made objects in space, and the detection, validation, and warning of attack against North America whether by aircraft, missiles, or space vehicles, utilizing mutual support arrangements with other commands. Aerospace control includes providing surveillance and control of Canadian and United States airspace.

This is one of the many organizations located inside the Cheyenne Mountain Air Station.
Click here for Specific Information on Cheyenne Mountain Today.

Cheyenne Mountain is a marvel in and of itself built inside a mountain.
Click Here for Cheyenne Mountain building Information and Pictures

Also many have heard or seen the operations center at NORAD.
Click here for more on the OPC