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Project Sign: Unidentified Aerial Objects, Technical Report F-TR-2274-IA (1949)

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The Air Force's first formal look at flying saucers, written in 1948 and released in February 1949. It says no definite evidence yet proves or disproves unknown aircraft. Read the report that started the official files.

Public domain copy

Made byUnited States Air Force, Air Materiel Command
Issued byAir Materiel Command, Wright-Patterson Air Force Base
Date1949
LanguageEnglish
FilePDF 17.6 MB
DownloadOriginal source

Where this comes from

This is a public-domain copy. The line below says where the file comes from and why we may host it.

Why we can share it: A report written by US Air Force officers as part of their duties, so it is a work of the US Government and in the public domain in the United States (17 USC 105). Declassified; the cover is marked Unclassified.

Read the story behind it

RecordProject Blue BookBetween 1947 and 1969 the US Air Force logged 12,618 UFO reports. When it closed the files, 701 still carried the label unidentified. Even its own scientific consultant later mocked it as a society for explaining the uninvestigated. What did the Air Force conclude, and what do the unexplained cases actually mean?

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