Take a close look at the message. This is the 800 lb. door that closed behind the two men who were in the missile command center. Two men had to be in the center at one time. They did not trust one man alone. The center had a bed for someone to sleep in, a tv, one holer, and all the communications you could think of. These two men were in charge of 10 minuteman missles. During a crisis, they could possibly be down there for more than 24 hours straight.