Interactive Map: UFO Sightings Taken Seriously by the U.S. GovernmentMysterious lights. Sinister saucers. Alien abductions. Between 1947 to 1969, at the height of the Cold War, more than 12,000 UFO sightings were reported to Project Blue Book, a small, top-secret Air Force team. Their mission? To scientifically investigate the incidents and determine whether any posed a national security threat. Here are some of their most fascinating cases.
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