The difference between an nuclear bomb and a hydrogen bomb.
In: Engineering
Imagine you’ve got a red balloon that pops so well, it can’t stay together long enough for it to pop properly. Now imagine you have a green balloon of a different material that’s *really* hard to pop, but when it does pop, it pops a whole lot better than the red balloon.
What you do is use the red balloon to pop the green balloon. If you are completely crazy, [you can use a red balloon to pop a green balloon, which in turn pops an even bigger red balloon.](https://en.wikipedia.org/wiki/Tsar_Bomba).
EDIT: Red balloon = Nuclear (fission) bomb, Green balloon = Hydrogen (fusion) bomb.
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