Earlier this year, the US Air Force declassified files relating to its investigations of unidentified flying objects (UFOs), making them available to the public at the US National Archives. The US government’s investigation of UFOs began in 1952 with what was called Project BLUE BOOK (PBB) and compiled in the Project Blue Book Archive (PBBA).
The investigations sought to determine whether or not UFOs were a threat to national security and to bring scientific analysis to the seemingly large amount of UFO data and sightings.
The following shapes are just one set of several showing the different types of UFOs investigated by PBB.
In total, the study covers more than 15,000 individual UFO reports from 1952 to 1968, including correspondence with witnesses, formal reports, monthly status reports, photographs, and more.
In 1968, the US government issued the Condon Report, which concluded that there was no threat to national security, and no evidence that the sightings were related to extraterrestrial vehicles and PBB was terminated. But Project Blue Book files remained classified until January 2015 causing a considerable amount of speculation that the government might be hiding something.
For more information on the US Air Force UFO archives, visit the Center for UFO Studies (CUFOS), which was founded by astronomer J. Allen Hynek, who once served as an advisor to Project Blue Book. The center is made up of scientists, academics, investigators, and volunteers who continue to examine and analyze UFO sightings and information.