What records mention Project Sign?

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What records mention Project Sign?

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Based on the provided documents, two records mention Project Sign by name, though one uses the popular name "Project Saucer." The USAF Flying Disc Reporting Correspondence file references a letter dated 30 December 1947 from Headquarters instructing the Commanding General, Air Materiel Command to "set up a project whose purpose is to collect, collate, evaluate and distribute to interested government agencies and contractors all information concerning sightings and phenomena in the atmosphere which can be construed to be of concern to the national security" [PURSUE-RELEASE-01/39f2de8f-85b5-47a7-9112-6891a47cf940]. This describes the directive that established what became Project Sign, though the document does not use that name explicitly. A newspaper clipping in FBI Case File 62-HQ-83894 refers to the Air Force investigation under the popular name "Project Saucer," stating it "was first headed by Lieutenant General Benjamin W. Chidlaw" and that its personnel were "augmented by astronomers, psychologists, physicists, meteorologists, physicians, and representatives of the F.B.I." [62-HQ-83894/e190d10e-ae61-4b33-8429-a2a394876c18]. A separate clipping in the same case file also uses the name "Project Saucer" and notes that investigators checked aircraft whose pilots reported close encounters with flying saucers using Geiger counters for possible radioactivity [62-HQ-83894/ecb52074-2b57-426d-b80f-e86c0c5bde91]. None of the provided documents use the name "Project Sign" explicitly.