Tracing the U.S. Government’s UFO History: Sign, Grudge, Blue Book, and the Condon Report
To the point
Orrin Grey shows that after World War II the U.S. government ran a sequence of UFO investigations—Sign, Grudge, and Blue Book—that largely concluded most sightings were misidentifications or natural phenomena, with a few unexplained cases, a view reinforced by the Condon Report and the National Academy of Sciences and resulting in publicly accessible records under FOIA.
