Equipped with pressurized cabins for high-altitude effectiveness, an electronic fire-control system, and remote-controlled machine-gun turrets, the B-29 Superfortress was the most advanced aircraft of WWII. Two of those planes, Enola Gay and Bockscar, dropped the atomic bombs on Hiroshima and Nagasaki in 1945. Yet over all, the B-29 received less notoriety than its storied elder siblings, the B-17 and B-24, perhaps because its service areas (the China,...