Air Force terminates Project Blue Book
December 17, 1969 · Washington, DC (Air Force) · Government program · Primary document linked
The Air Force announced the end of Project Blue Book. Of 12,618 sightings reported to the project between 1947 and 1969, 701 remained classified as 'unidentified'. The records were later declassified and transferred to the National Archives.
Why it matters (4/5)
Ended the official U.S. UFO investigation for decades and left a large public records set.
Sources
- 50 Years Ago: Government stops investigating UFOs (press release) (U.S. National Archives (NARA)), primary
- Project BLUE BOOK – Unidentified Flying Objects (U.S. National Archives (NARA)), primary