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See the Top 10 Scariest UFO Encounters Ever Recorded | Ancient Aliens (S20, E4) | Full Episode
What happens when trained pilots, military personnel, and ordinary people all report encounters they can't explain? Join Giorgio Tsoukalos as Ancient Aliens counts down the 10 scariest UFO encounters ever investigated. From aircraft seemingly hijacked in midair and radar-confirmed sightings to military base incidents, mysterious abductions, and ...
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