For more than 20 years, the U.S. Air Force documented and analyzed UFO sightings through Project Blue Book, which launched in 1952. The National Archives ... source

Paul is the son of Dr. J. Allen Hynek, an astronomer who worked with the U.S. Air Force investigating UFO cases from 1948 to the end of Blue Book in 1969. Paul’s father began his investigation with USAF as a skeptic, but by the time Blue Book ended, he was convinced some UFO cases posed a real ...