Final answer:
The Manhattan Project was a research program during WW II to create the first nuclear weapons.
Step-by-step explanation:
The Manhattan Project was a research program designed by the United States during WW II to create the first nuclear weapons. It was a top-secret project that involved scientists, engineers, and military personnel working together to develop atomic bombs. The project was successful, and the first atomic bombs were tested and used on the Japanese cities of Hiroshima and Nagasaki in 1945, leading to the end of World War II.
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