U.S. Air Force — Project Blue Book
The program that investigated UFO reports from 1952 to 1969. Its records — 94 rolls of microfilm, publication T-1206 — sit with the National Archives, Record Group 341, open to the public.
12,618 cases investigated • 701 left unidentified • Closed December 17, 1969
- Project BLUE BOOK — Unidentified Flying Objects — the Archives’ own guide to the program, the numbers, and the records.
- Socorro, New Mexico, April 1964 — the record card marks it “Unknown.”
- Lubbock papers, August–September 1951 — filed in the unit catalogued as “Orange, Va, September 1951”; images 7–118 are the Lubbock papers, including the Hart photographs.
- Levelland, Texas, November 1957 — record card: “Ball lightning.” The field report was “forwarded as unresolved.”
- Project Blue Book Administrative Files, 1947–1969 — the program’s own paperwork, separate from the case files.