Project Blue Book

The Air Force's longest-running named investigation of unidentified flying-object reports, now represented by records in National Archives custody.

Active years1952–1969

OwnerU.S. Air Force

Official program recordSources linkedv1

Timeline

What each dated step adds to the record.

01
March 1952Documented
Project Blue Book name begins
The Air Force program continued earlier investigations under the Project Blue Book name.
02
December 17, 1969Documented
Air Force announces termination
The Air Force ended Project Blue Book and later transferred records to the National Archives.
03
November 20, 2019Documented
National Archives marks the 50-year record
A National Archives release summarized the program and announced a public document display drawn from its holdings.