Among the most sophisticated aircraft flown during World War II, the Boeing B-29 Superfortress was designed to replace the B-17 as the primary long-range bomber of the U.S. Army Air Forces. With its distinctive glazed nose and long, thin wings that provided both speed at high altitude and stability at takeoff and landing, the Superfortress was the first operational bomber with a pressurized crew cabin and featured advanced radar and avionics.