USA: Air Force Terminates Project Blue Book (1969)
Following the Condon Report's recommendation, the United States Air Force officially ended its twenty-two-year UFO investigation program. This decision marked the conclusion of the government's formal involvement in studying unidentified flying object reports. Via TheBlackVault.com (FOIA).
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Background
In 1969, the United States Air Force discontinued Project Blue Book, its systematic investigation of UFO sightings that began in 1947. The termination followed the Condon Committee's conclusion that continued study of unidentified aerial phenomena lacked scientific merit. Project Blue Book had investigated over 12,000 sightings during its operation, leaving hundreds of cases officially unexplained at the time of closure. The shutdown ended the Air Force's public engagement with UFO phenomena, though critics argued the decision was based on flawed recommendations from a biased investigation.