2. Greenhouse George
Before the Shot

3. Greenhouse George Fireball

4. Greenhouse George
225 ktonne, 11 times Nagasaki
May 1951

5. “It is my judgement in these things that when you see something that is technically sweet, you go ahead and do it and you argue about what to do about it only after you have had your technical success. That is the way it was with the atomic bomb.”
Robert Oppenheimer, June 1951

6. First large (10.4 MTonne) U.S. Fusion Bomb

9. PRIMARY REACTIONS IN THE HYDROGEN BOMB

10. As many stage as desired can be added.
Multi-stage bomb
As many stage as desired can be added.
There is no limit.

11. Before
After

12. Nagasaki size bomb
over Manhattan
20 kTonne
Mike size bomb
over Manhattan
10.4 MTonne

13. a moment when the course of the world suddenly shifted from the path it had been on to a more dangerous one. Fission bombs, destructive as they might have been, were thought of as being limited in power. Now, it seemed, we had learned how to brush even those limits aside and to build bombs whose power was boundless.
Herbert York. Director
Livermore National Laboratory

14. This would be a deterrent - but if the contest to maintain
this relative position should have to continue indefinitely,
the cost would either drive us to war - or into some form
of dictatorial government. In such circumstances, we would
be forced to consider whether or not our duty to future
generations did not require us to initiate war at the most
propitious moment that we could designate.
Dwight Eisenhower