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Many Scientists came form Europe to create the atomic bomb, because of Hitler and all that. Albert Einstein was the one who first informed Franklin D. Roosevelt about the idea. When Roosevelt died Harry S. Truman (vice president) stepped in. While all of that was happening; they were still in war with Japan. To make Japan surrender; Truman decided to use the atomic bomb against Japan. They first bombed Hiroshima with a uranium bomb they called "Little Boy". Then when Japan still didn't surrender; Truman decided to also bomb Nagasaki. With a plutonium bomb they called "Fat Man". And that's why (:

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Q: Why was the Manhatten project used?
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Related questions

What was the codename of the first atomic bomb?

The project was called the Manhatten Project


How does the Manhatten Project produce?

the atomic bomb


Who was involved in the Manhatten Project?

Clair Patterson


What was the result of the Manhatten Project?

The atomic bomb


What was the results of the manhatten project?

The atomic bomb


What years did the Manhatten Project take place?

1942to1945


Who was in charge of the Manhatten Project?

General Leslie Groves


What is the Codename for the atomic bomb program?

The Manhatten Project.


What president started the Manhatten project?

Franklin d. roosevelt


Where the nuclear bombs built in the manhatten project?

Los Alamos, NM


How was the Manhatten Project connected to the atomic bomb?

The Manhattan Project was the secret research program to develop the atom bomb.


Who really created the atom bomb?

The scientists of the Manhatten Project. Chiefly, J Robert Oppenhiemer as the scientific director of the project.