The Nameless pre-Christmas Geek Quizz

[Nameless]

Hint: They are all closely related in some way to the creation of a special device that did change the face of the world.

I was going to guess that they all had something to do with the A-Bomb, but I decided to be a dick instead. Is that close?

Actually, you're right on!.

They all participated closely to the history of the A-Bomb at various degrees. Now can you identify them all?