Boeing B-29 Superfortress
During WWII it was used only in the Pacific by the 20th Air Force against the Japanese. It was a very advanced bomber for it's day, with pressurized crew compartments and remote-controlled gun turrets.

While envisioned as a high altitude daylight bomber, it's greatest successes were low-level nighttime raids dropping incendiary bombs on the combustible Japanese cities. The B-29 "Enola Gay" and "Bock's Car" are famous for dropping the A-bombs on Hiroshima and Nagasaki, which ended the war.

After the war it became the main means of intended delivery for nuclear bombs. It was last used operationally in the Korean War conducting strategic bombing.