FDR
He authorized its development by the US.
Harry S. Truman .
President Harry Truman
the us created the atomic bomb
no the atomic bomb stopped being used after world was 2
If you are referring to the nuclear bomb, it was dropped over Japan in world war 2 and not the cold war. Those bombs were authorized by President Truman.
No
An atomic bomb.
It was used in the world war two, its an atomic bomb!
There was no 4th atomic bomb.
The element first used for fission in an atomic bomb is uranium.