Unidentified Flying Objects (UFOs)

This issue is no longer being investigated by the Defense Department. As you may know, the United States Air Force began investigating UFOs in 1948 under a program called Project Sign. Later the program’s name was changed to Project Grudge, and in 1953 it was changed again to Project Blue Book. On December 17, 1969, the Secretary of the Air Force announced the termination of Project Blue Book.

The decision to discontinue UFO investigations was based on a number of factors, including reports and studies by the University of Colorado and the National Academy of Sciences, as well as past UFO studies and the Air Force’s two decades of experience investigating UFO reports.

As a result of these investigations, studies, and experience, the conclusions of Project Blue Book were:

Between 1948 and 1969 the Air Force investigated 12,618 reported UFO sightings. Of these, 11,917 were found to have been caused by material objects such as balloons, satellites, and aircraft; immaterial objects such as lightning, reflections, and other natural phenomena; astronomical objects such as stars, planets, the sun, and the moon; weather conditions; and hoaxes. Only 701 reported sightings remain unexplained.

All documentation regarding the former Blue Book investigation was permanently transferred to the Military Reference Branch, National Archives and Records Administration, 8th and Pennsylvania Avenue, Washington, DC 20408, and is available for public review. A list of private organizations interested in aerial phenomena can be found in Gale’s Encyclopedia of Associations, available in the reference section of many libraries. Air Force Fact Sheets on this topic may be viewed, including one about the so-called Roswell Incident . The Naval Historical Center has compiled a bibliography.

by United States Department of Defense


http://www.defense.gov/faq/pis/16.html

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