Which airplane dropped Fat Man on Nagasaki?

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The atomic bomb known as Fat Man was dropped on Nagasaki by a B-29 Superfortress bomber named Bockscar.123

The aircraft was piloted by Maj. Charles W. Sweeney. Although Bockscar was typically piloted by Capt. Frederick C. Bock, the crews switched planes for this mission because Sweeney’s usual aircraft, The Great Artiste, was still equipped with scientific instrumentation from the earlier Hiroshima mission and could not carry the Fat Man device.13