Caelum Incognitum — The interactive encyclopedia of ufology
Donald Keyhoe (1897-1988)
People
Former US Marine officer and writer. Author of The Flying Saucers Are Real (1950), he led NICAP from 1957 to 1969 and accused the US Air Force of downplaying sightings. He was one of the most influential proponents of the extraterrestrial hypothesis.