Final answer:
The Manhattan Project was the codename for the research and building of the atomic bomb during World War II. It aimed to develop the bomb before Nazi Germany and resulted in the use of the bomb on Hiroshima and Nagasaki.
Step-by-step explanation:
The subject of the question is the Manhattan Project, which was the codename for the research and building of the atomic bomb during World War II. The project was led by the United States and aimed to develop the bomb before Nazi Germany. It involved numerous scientists, engineers, and military personnel working in secret locations across the country. The successful development of the atomic bomb eventually led to its use on the Japanese cities of Hiroshima and Nagasaki in 1945.
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