Add Yahoo as a preferred source to see more of our stories on Google. The NORAD Cheyenne Mountain Complex dates back to the height of the Cold War. Initially meant for defense against long-range ...

WASHINGTON — For the last seven decades, a joint United States and Canadian operation has tracked Santa as he delivers gifts across the world. This year, there's a new way to track him. The North ...

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 ...