1969
HALL III · Closed December 17, 1969
Project Blue Book
The U.S. Air Force investigates, 1952 — 1969
Wright-Patterson Air Force Base, Ohio
CURATOR'S WALL TEXT
LEVEL
LENS
Project Blue Book, and its predecessors Sign and Grudge, formally investigated 12,618 UFO reports between 1947 and 1969. The program concluded that no investigated sighting indicated a threat to national security and that no evidence suggested extraterrestrial origin. Seven hundred and one cases were classified 'unidentified.' The complete project files are held by the National Archives and are accessible online.
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