Government program
Project Blue Book
The longest-running U.S. Air Force public investigation of UFOs, succeeding Projects Sign (1947) and Grudge (1949). Officially terminated by the 1969 Condon Report.
Headquartered at Wright-Patterson AFB and at various points run by Captain Edward Ruppelt, Major Hector Quintanilla, and others. Investigated 12,618 reports, 701 of which remained 'unexplained' at closure. Dr. J. Allen Hynek served as scientific consultant throughout. Officially terminated in 1969 after the University of Colorado's Condon Committee concluded that further study was unwarranted.