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Adamski Air Force investigators airship Allen Hynek ancient anti-UFO Arnold balloon became began believe Betty Hill Bo and Peep book called Chapter Condon Committee Condon Report contactees cover-up craft creatures Daniken Donald Keyhoe Earth excitement explain extraterrestrial spaceships flying saucers flying-saucer Fred Crisman Fuller going heard Hickson Hill hoax idea incident interest in UFOs Keyhoe's land later light looked magazine Mantell Maury Island monster Mothman mysterious National never NICAP object official Phil Klass pilots plane pro-UFO Project Blue Book psychic radar radio Ray Palmer Robertson Panel rumors Ruppelt Sanderson scientific scientists scoutmaster secret seemed seen Shaver sort space story subject of UFOs swamp gas talk theory things tion told took truth turned UFO buffs UFO business UFO investigation UFO reports UFO sightings Ufological Ufologists unidentified Vallee Washington witnesses world of UFOs wrote Zamora