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astronautics, unidentified flying object (UFO), flying ufo, show flight of Semjas space ship, around a fir tree, Switzerland, 9.7.1975, Additional-Rights-Clearences-Not Available Stock Photo - Alamy
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astronautics, unidentified flying object (UFO), ufos, show flight of Semja ship, Hasenböl-Langenberg, Ob Fischenthal, Switzerland, 29.3.1976, Additional-Rights-Clearences-Not Available Stock Photo - Alamy
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Flying saucers' spotted in Pacific Northwest 74 years ago sparked craze, leading finally to U.S. government's UFO report - oregonlive.com
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astronautics, unidentified flying object (UFO), flying ufo, Hasenböl-Langenberg, Switzerland, 29.3.1976, Additional-Rights-Clearences-Not Available Stock Photo - Alamy
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