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Edward J. Ruppelt (July 17, 1923 – September 15, 1960) was a United States Air Force officer probably best known for his involvement in Project Blue Book, a formal governmental study of unidentified flying objects.
Robert Sheaffer (born 1949 in Chicago, IL) is a freelance writer and a prominent investigator of unidentified flying objects, Christianity, academic feminism, and many other subjects.
Project Blue Book, the United States Air Force's study of Unidentified flying objects
Project Grudge, a project by the U.S. Air Force to investigate unidentified flying objects (UFOs)