'As Salas started to inform his duty partner and commander about what was going on 60 feet above them, something chilling happened. "All of a sudden, we started getting bells and whistles going off. As we looked at the display board in front of us, sure enough, the missiles began going into an unlaunchable, or no-go, mode. They couldn't be launched -- it went from green to red.

"We also had a couple of security violations, meaning there were lights indicating some kind of intrusion at the missile sites, where the missiles were actually located, about a mile or two away from the launch control facility".'

Read more: Former Air Force Officers: UFOs Tampered With Nuclear Missiles