Making the bombshell was easy, but the challenge was getting the right type of fissionable material, which was uranium and plutonium. Another big one was on how to trigger the chain reaction in time so it will not pulverize itself if it fissions too slow, nor blow up the bomb plane carrying it in midair if the fission chain is too fast.
he did not build the atomic bomb
the Nazi didn't build the atomic bomb the Americans did....
It takes very little time to build an atomic bomb, once a country has the necessary industrial infrastructure to produce the fissile material.
To defend against a possible Nazi atomic bomb!
1945
No, they designed but did not build them.
the first atomic bomb.......................................
the Manhattan project
Yes, that was its codename.
no
Manhattan Project
The original reason that the US began the project to build the atomic bomb was fear. Fear that Nazi Germany would build one first and use it to take over the world.After the war ended the US and USSR built them out of fear of each other.