[Answer] What was the plane's name that dropped the atomic bomb on Nagasaki to end World War II?

Step 1 : Introduction to the question "What was the plane's name that dropped the atomic bomb on Nagasaki to end World War II?"

...On Aug. 9, 1945, Maj. Gen. Charles W. Sweeney piloted the B-29 Superfortress "Bockscar" over Japan. Its mission was to drop the second of two atomic bombs on the island nation. Smoke obscured the original primary target city of Kokura. Unable to verify the target, Sweeney turned the "Bockscar" toward the secondary target, the city of Nagasaki. The "Bockscar" is now on display at the U.S. Air Force Museum in Dayton, Ohio. Source: NYTimes.com

What was the code name of the atomic bomb that was dropped on Nagasaki on this day in 1945?

Step 1 : Introduction to the question "What was the code name of the atomic bomb that was dropped on Nagasaki on this day in 1945? "

It was the second of the only two nuclear weapons ever used in warfare, the first being Little Boy, and its detonation marked the third-ever man-made nuclear explosion in history.