Although flown for the first time in prototype YB-52 form on 15 April 1952, and entering service with the 93rd Bomb Wing of Strategic Air Command at Castle Air Force Base in California in June 1952, the B-52, albeit in much modified form, remains in service with the USAF, and is expected to remain so for some years to come.
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B-52 Stratofortress: Boeing's Iconic Bomber from 1952 to the
An overview of the Air Force nuclear mission > Malmstrom Air Force
B-52
Boeing B-52 Stratofortress - Wikipedia
B 52 front view hi-res stock photography and images - Alamy
B 52 bombers hi-res stock photography and images - Alamy
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After 60 Years, B-52s Still Dominate U.S. Fleet - The New York Times
B-52 Bomber: One Hundred Years Flight