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According to United States Air Force (USAF) officer and Project Blue Book supervisor Edward J. Ruppelt, the Chiles-Whitted sighting was one of three "classic" UFO incidents in 1948 that convinced the personnel of Project Sign, Blue Book's predecessor, "that UFOs were real", along with the Mantell UFO incident and the Gorman dogfight. However, later studies by Air Force and civilian researchers indicated that Chiles and Whitted had seen a meteor, possibly a bolide, and in 1959 Project Blue Book formally stated that a meteor was the cause of the incident.