The Cheyenne Mountain Complex, located in Colorado Springs, Colorado, collects top secrete information from satellites and ground-based sensors around the world.
http://www.dailymail.co.uk/sciencetech/article-3508670/Take-tour-resort-bunker-Military-facility-built-50-years-Cold-World-gathers-intelligence-world.html
Skynet's 50-year-old blast-proof bunker