An Unknown Aircraft Penetrated U.S. Nuclear Facilities in 1975 | Close Encounters

It s 1975 at Loring Air Force Base--the largest strategic Air Force base in America and a repository for nuclear weapons. Military officers at the base witness something unexplained. | For more Close Encounters, visit http://www.sciencechannel.com/tv-shows/close-encounters/#mkcpgn=ytsci1 Subscribe to Science Channel! | http://www.youtube.com/subscription_center?add_user=sciencechannel