Deep inside a mountain in Colorado, in a huge cavern blasted out of solid granite, is a secret military base. On the surface it looks just like any other tree-covered mountain, but get past the security guards and you will find your way into an entire underground city. Although the base is no longer a major command center, the military personnel once stationed here constantly monitored potential threats to the United States. It was always staffed with five crews of 40 people, but could accommodate 800 people in the event of an attack...wanna go?