Codename was - The Manhattan Project.
Do you mean the name/codename if so its codename was "Little Boy"
Oppenheimer was the scientific director of the development of the atom bomb in New Mexico.
Fat Man.
The Manhatten Project.
It was hit with an American atom bomb.
Yes, that was its codename.
An atom is not a bomb.
The Manhattan project.
The project was called the Manhatten Project
Project Manhattan.
Robert Julius Oppenheimer is credited with being the Father of the Atom bomb, but he was American.
atom bomb