Throughout the 1950s and 1960s, the United States Air Force investigated thousands of UFO reports, under a program called Project Blue Book. Their conclusion: no evidence exists for extraterrestrial vehicles. Author Robert Goldberg believes the main purpose of Blue Book was public relations and disinformation. In an interview with ABC News, he described their mission to "denounce the UFOs, dismiss the UFOs, debunk the UFOs and anybody who believes in them -- just come up with answers and get this UFO thing out of the newspapers." Read more from ABC News(1).
Explore the Project Blue Book Archive(2).