I believe it was the Manhattan Project
Manhattan Project
The Manhattan Project was the code name for the WWII project to build the first Nuclear Weapon, the Atomic Bomb.
To create the atomic bomb before Nazi Germany could (if possible). Otherwize to have an atomic bomb to use on Nazi Germany in retaliation for their using them on England or the USSR (our allies). It was never expected when the Manhattan Project started that we might use them on Japan, but after Germany surrendered just before the Manhattan Project had a working atomic bomb, it had significant momentum, and it was becoming obvious how hard it really would be to defeat Japan the US decided that as fast as the atomic bombs could manufactured by the Manhattan Project's factories the atomic bombs would be used on Japan until it surrendered.
Atomic bombs
it was a secert program. the goal was to develop an atomic bomb, a weapon the produces tremendous power by splitting atomics.
Manhattan Engineering District
Manhattan project
Oppenheimer
the creation of atomic weapon !
To create the first Atomic Weapon (part of the Manhattan Project)
The united states researched, built, tested and created the first atomic weapon.
The Manhattan Engineering District, eventually renamed just Manhattan Project.