Alien conspiracy theories are no longer just for lonely middle-aged "X-Files" fans who still live with their parents.

Today, six former U.S. Air Force officers have decided to break their silence . . . and tell the world that the government KNOWS about aliens, and that those aliens are monitoring our nuclear weapons.

The six officers will be at the National Press Club to share their stories of close encounters . . . and the government cover-ups that followed.

Robert Salas is a retired Air Force captain.  He was on duty at Malstrom Air Force Base in Montana back in 1967 when, suddenly, all the nuclear missiles on the base malfunctioned.  He believes a UFO was overhead at the time.  And he's not alone.

Salas says that he has witness testimony from at least 120 military personnel who have either seen a UFO or an extraterrestrial event . . . almost always at military bases that had nuclear weapons.

He says, quote, "There's a strong interest [in our missiles] by these [UFOs], wherever they come from.  I personally think they're not from planet Earth.  The U.S. Air Force is lying about the [UFOs] . . . and we can prove it."

Besides sharing their stories and testimony, Salas and the other former officers will distribute some declassified government document that, they claim, will prove that the government knows about UFOs and alien activity.

I think aliens might not want to try and make contact...too many people would want them to take them with them!

(FOX NEWS)