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Project Sign
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Sources
Unidentified flying object - Wikipedia en.wikipedia.org 9 facts
claimProject Sign was a U.S. Air Force investigation into UFOs conducted by the Air Materiel Command at Wright Field, serving as a precursor to Project Grudge in 1948.
claimProject Sign was created by the Air Force at the end of 1947 and was one of the earliest government studies to reach a secret extraterrestrial conclusion.
accountIn August 1948, Project Sign investigators produced a top-secret intelligence estimate regarding unidentified flying objects, which Air Force Chief of Staff Hoyt Vandenberg subsequently ordered to be destroyed.
accountAstronomer and USAF consultant J. Allen Hynek and Captain Edward J. Ruppelt, the first head of Project Blue Book, revealed the existence of a suppressed top-secret intelligence estimate from Project Sign that had been ordered destroyed by Hoyt Vandenberg.
measurementThe U.S. Air Force investigated more than 250 UFO cases between 1947 and 1949 under Project Sign.
claimProject Grudge was a U.S. Air Force investigation that succeeded Project Sign in February 1949 and was subsequently succeeded by Project Blue Book in March 1952.
referenceProject Sign's final report, published in early 1949, stated that while some UFOs appeared to represent actual aircraft, there was insufficient data to determine their origin.
accountProject Sign was dismantled and replaced by Project Grudge at the end of 1948.
claimThe United States Air Force conducted Project Blue Book (which included the previous projects Project Sign and Project Grudge) from 1947 until 1969.
How the Pentagon Started Taking U.F.O.s Seriously | The New Yorker newyorker.com Apr 30, 2021 4 facts
claimProject Sign investigators filed a top-secret memorandum titled 'Estimate of the Situation' which leaned in favor of the extraterrestrial hypothesis regarding unidentified flying objects.
accountProject Blue Book was a continuation of Project Sign and operated out of Wright-Patterson Air Force Base near Dayton, Ohio.
claimOfficials within Project Sign were divided between those who believed the flying discs were of interplanetary origin and those who attributed the sightings to misperception.
claimThe 'Twining memo' initiated Project Sign, a classified study to investigate U.F.O.s, based on concerns that a foreign rival like the Soviet Union had achieved an unimaginable technological breakthrough.