Calvin Bolster was a major figure in naval aerotech and missile development post-WWII. An accomplished engineer, he was involved with jet-assisted take-off planes and the air-to-air guided missile program. He retired as a Rear Admiral and was much decorated. As a classmate and friend of Donald Keyhoe from US Naval Academy days, he served as an inside source for information coming to Keyhoe and NICAP during the 1950s. One particularly valuable piece of such information was Bolster's confirmation that the planes of Secretary of the Navy Dan Kimball and the Navy's Chief of Staff Admiral Arthur Radford had indeed had close passes from one or more unidentified objects while crossing the Pacific in 1952.