Boeing B-29 Superfortress

The Boeing B-29 Superfortress was the most technologically advanced aircraft of WWII, featuring pressurized crew compartments, remote-controlled gun turrets, and a central fire-control computer. It was designed specifically for the strategic bombing campaign against Japan and could fly higher and farther than any previous bomber. B-29s conducted the devastating firebombing raids on Japanese cities and, most significantly, the Enola Gay and Bockscar dropped the atomic bombs on Hiroshima and Nagasaki in August 1945, ending the war. The program cost $3 billion, more than the Manhattan Project itself. B-29s later served in Korea and as aerial refueling tankers before retirement.