Wright-Patterson Foreign Technology Division Archive

From July 1947, Wright-Patterson Air Force Base in Dayton, Ohio served as the central institutional repository for the US Air Force's UAP investigation programs. Air Materiel Command's T-2 Intelligence Division initially received physical materials and photographic evidence from UAP incidents across the United States. Successive programs — Project Sign (1947-1949), Project Grudge (1949-1952), and Project Blue Book (1952-1969) — were all headquartered or institutionally connected to Wright-Patterson. The Foreign Technology Division analyzed photographs, films, and physical trace evidence. Multiple senior officers, including General Nathan Twining who wrote the famous 1947 memo acknowledging the 'real' nature of UAP, were associated with Wright-Patterson's analysis programs. Retired USAF officers, including those affiliated with the Disclosure Project, gave testimony describing physical materials programs at Wright-Patterson. The existence of classified materials analysis beyond what was released in the Blue Book files has been alleged by multiple former personnel and has never been officially confirmed or denied.