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It was president Franklin D. Roosevelt who order the development of the atomic bomb. It was Harry S. Truman who order its use on Japan during World War II.

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Which us president brought in the atomic age?

President Franklin D. Roosevelt authorized the development of the atomic bomb, but Harry Truman was President at the time of the bomb's first successful test, and he is the one who authorized its use in populated areas. The Manhattan Project, the development of the atomic bomb, was such a secret that even Vice President Truman didn't know about it until after he became President. (I don't know whether or not Vice President Wallace knew about the project.)


Which president authorized the creation of the atomic bomb?

FDR


How was FDR related to the atomic bomb?

He authorized its development by the US.


What president authorized the atomic bomb on Japan?

Harry S. Truman .


The Manhattan Project was the code name for the?

The Manhattan Project was the secret project to design and build the world's first atomic bomb.


Who was American leader who authorized the dropping of the atomic bomb on Japan?

President Harry Truman


Who was the US president who authorized atomic bombings of Japanese cities?

Harry S Truman


When and where was the atomic bomb used and who authorized it?

August 1945, Japan, US president Truman


What was the result of the Manhattan project?

The primary result of the Manhattan project was the development of the atomic bomb.


The name for the development of the atomic bomb in the USA?

The Manhattan Project .


The development of the atomic bomb that was dropped on Hiroshima?

The Manhattan Project


Which president ordered the drop of the atomic bomb on Hiroshima and Nagasaki?

U. S. President Harry S. Truman authorized the US Military to use the two atomic bombs against the Japanese targets that were previously selected. The local US military commanders would make the final target selection based on weather. Earlier in the war, President Franklin D. Roosevelt had authorized the "Manhattan Project" to create the atomic bombs. He died in office before Germany surrendered, and before the first bomb was tested in the US. His Vice-President Harry Truman assumed the Office of the President.