The local NBC affiliate jumped through the requisite flaming hoops to both get a tour inside of Cheyenne Mountain and be in possession of a camera while doing it:
http://www.9news.com/news/article/28278 ... e-Mountain
Regrettably, no captions. Some of the mongo blast doors and spring-loaded shock barriers, I had heard about before. Also, no longer capable of fully resisting a modern warhead yield, I've heard, which is part of the reason they no longer keep it quite as secret as they used to. Pretty interesting photos though. It's a classic example of the 1950s/1960s engineering ethos: if at first you don't succeed, use twice as much material and then bolt it down into solid bedrock.