U.S. Air Force
The service branch that ran Project Blue Book (1952–1969), the U.S. government's longest-running public UFO investigation, and announced its termination.
Role in UAP Records
The U.S. Air Force operated Project Blue Book from 1952 to 1969, investigating reported UFO sightings; its predecessor efforts (Project Sign, Project Grudge) date to 1947. On 17 December 1969, the Secretary of the Air Force announced the project's termination, citing an independent University of Colorado study (the Condon Report) and a National Academy of Sciences review of it. These records document the Air Force's own investigation and its decision to end it, distinct from NARA's later custodial holdings of the same case files.
Official Source
https://www.esd.whs.mil/Documents are linked to official source pages; copyright and license notes are recorded per source.
Collection Status
Every record links to its official source page. Many records also include an AI-assisted summary, a Chinese translation, machine-extracted full text, and a hosted preservation copy — see each record page.
Related records
- Air Force to Terminate Project 'Blue Book' (Secretary of the Air Force press release, 17 December 1969) Report landing 1960s Official link verified
- Scientific Study of Unidentified Flying Objects (University of Colorado / Condon Report, 1968) Report landing 1960s Official link verified
Future Record Areas
- ◦ Project Blue Book termination announcement (1969)
- ◦ Contracted independent studies (Condon Report)