Final answer:
The Manhattan Project was the research and development project that produced the first atomic bombs during World War II.
Step-by-step explanation:
The research and development project that produced the first atomic bombs during World War II was the Manhattan Project. It was a top-secret project of the United States government with the goal of developing atomic weapons. The project began in 1939 and involved thousands of scientists, engineers, and researchers working at multiple sites across the country. The most famous atomic bomb, named Little Boy, was dropped on Hiroshima, Japan on August 6, 1945, by the Enola Gay, a B-29 Superfortress bomber.
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