Ancient Aliens: The US Government's Evidence of UFOs (Season 12, Episode 1) | History
The first official military case file on UFO sightings began in 1948 after a large number of credible witnesses claimed to have seen alien space crafts. Learn what the file said in this clip from Season 12, Episode 1, “The Alien Hunters”. #AncientAliens
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“Ancient Aliens” explores the controversial theory that extraterrestrials have visited Earth for millions of years.
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