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6:01
YouTube
HISTORY
The Puerto Rico UFO Mystery (S18) | Ancient Aliens
A mysterious metallic object captured by a thermal camera during a border protection patrol over Puerto Rico sparks questions about the true nature of unexplained aerial phenomena. See more in this clip from Season 18, Episode 11, "Alien A.I." Stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com ...
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