Each of these people or terms are related to the use of atomic bombs against Japan at the end of World War II. See if you can match each one to the correct definition or description. Not all choices will be used.

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This was the code name for the atomic bomb dropped on Hiroshima in World War II.
This was the effort during World War II to develop the first nuclear weapons of the United States in collaboration with the U.K. and Canada.
The name of the B-29 Superfortress airplane piloted by Col. Paul Tibbetts that became the first aircraft to drop an atomic bomb as a weapon of war in August 1945.
This is the Japanese city that was the first to be subjected to nuclear warfare to bring about the end of World War II.
This is the name of the second city to be attacked with an atomic weapon during World War II.