That was the code name of the operation.
the nuclear bombs
Opennheimer
J. Robert Oppenheimer was in charge of the Manhattan Project, which was started by Franklin Delano Roosevelt. The Manhattan Project produced both atomic bombs.
The Manhattan project was controversial because the result was the production of very dangerous nuclear bombs.
Manhattan experiment project produced the first atomic bombs in the course of World War II.
MacArthur knew nothing about the Manhattan Project until after the bombs were dropped.
The Manhattan Project began in 1942 and ended in August 1947, with the establishment of the Atomic Energy Commission. A rough estimate is that in this time 15 to 20 atomic bombs had been built, with 5 of those detonated, leaving a stockpile by the time the Manhattan Project ended of 10 to 15 atomic bombs.
They were the names given to bombs. Research the Manhattan project.
America was in debt during the Manhattan project. The Manhattan project was led by the United States and produced the first atomic bombs during World War II.
The project to build the atomic bomb was given the secret code-name of "The Manhattan Project", however the bombs were not built in Manhattan. Check wikipedia for details on actual locations.
MK-I Little Boy & MK-III Fat Man
Created the first Atomic Weapon (Nuclear Bomb). And ended WW2 with the dropping of 2 A-Bombs on Japan.