Project Blue Book

December 17, 1969

Project Blue Book

Project Blue Book was the name given by USAF to record sightings and findings of Unidentified Flying Objects (UFOs) from 1947 until it ceased to exist on December 17, 1969.

Other sources claim it was "just a low level collection and disinformation program created under Project Sign" to cover up the real investigations.

http://www.ufoevidence.org/topics/projectbluebook.htm