America has a little under 10,000 nukes...which does a bit more than N. Korea's 'big one' or whatever Kontro was talking about. America also have nuclear missiles that split into ten separate nukes, making it incredibly difficult to be targetted by nuclear defenses. Which Korea is lacking in. There are several reasons why it would be an incredibly stupid idea to cross Korea --- mainly, it's allies. Russia, for example, is not exactly lacking in the nuclear department. Israel is thought to have 400. Many, many countries have nukes...no one is going to attempt world domination alone anytime soon.