The National Archives' Project BLUE BOOK page is the official research guide for the Air Force's retired UFO-investigation records, which NARA says were declassified, transferred to its custody, and remain available for public review and analysis.1
It matters because the reproduced Air Force fact sheet gives the baseline record before later UAP debates: Project BLUE BOOK received 12,618 reports from 1947 to 1969, left 701 unidentified, and ended after the Secretary of the Air Force announced its termination on December 17, 1969.1
Use the guide with NARA's UFO/UAP topic pages to follow the holdings by record group: RG 341 points to Project Blue Book administrative files, sanitized case files, artifacts, motion-picture films, sound recordings, and still-picture records in the National Archives Catalog.2345
For online access, NARA's bulk-download page links Catalog metadata and downloadable packages for digitized Project Blue Book administrative files, case files, sanitized case files, photographs, and motion-picture films.6
Read it as an official archive map, not a live reporting channel or complete online substitute for onsite research: the Blue Book page says NARA has no sighting information after 1969, the reference report describes microfilm and separate media-branch holdings, and the bulk-download guidance says some materials are catalog-only or require onsite viewing because of rights restrictions.16
The context notes are as important as the catalog links: NARA says it certifies copies rather than authenticating the information inside them, reports no Project BLUE BOOK documentation for the 1947 Roswell incident, and separates legacy UFO/UAP holdings from newer RG 615 UAP records transferred under the 2024 NDAA.12