atom bomb ,
atomic bomb
A-bomb
fission bomb
plutonium bomb

Then let's go back to the fission bomb again for a moment.

We're using uranium research and the possibility of a fission bomb as a cover story.

They're telling us we better not be first to escalate past tactical fission bombs.

Jack, the fission bomb was it in the mass murder department.

With only fission bombs, nuclear war was something that possibly could be limited.

This is one of the three main requirements in a nuclear weapon design to create a working fission atomic bomb.

The requirement of a fission bomb makes the method impractical for power generation.

Because this lets them develop the fission bomb first.

The fusion idea was put aside to concentrate on producing fission bombs.

Our signal to begin would be the flash of the fission bomb.