Project Blue Book

The United States Air Force's official program to investigate UFO reports, operating from 1952 until 1969. Headquartered at Wright-Patterson AFB, it collected over 12,000 reports, ultimately concluding that UFOs did not represent a national security threat or extraterrestrial technology. The project was terminated following the recommendations of the Condon Report.

The longest-running and most famous official US government UFO investigation program.