Aliens disabled nuclear missiles to send a warning to humanity, a former US Air Force Captain has claimed.
Captain Robert Salas revealed that a UFO switched off ten independently-run missiles at an air force base in Montana during the 1960s as the extraterrestrials do not want the human race to use nuclear weapons.
Salas claims that he was ordered to sign a vow of silence regarding the encounter and added that the world's intelligence community has covered up decades of alien activity.
He told The Sun Online: "I was in charge of ten nuclear missiles at the time when a UFO came over and hovered over our facility and while it was hovering there it was seen by all our guards.
"I was 60 ft underground, locked into a concrete capsule. It was reported to me directly by those guards.
"While the object was up there we lost all ten missiles due to guidance and control failure."
Salas added: "I can only speculate as to why it happened. This was a demonstration by an object of extraterrestrial origins and I don’t say that lightly."