North Korea will become a Nuclear armed state and there is very little the US can credibly do about it.
Well, we all better hope that that is not true. Because if it is, and North Korea becomes a fully operational nuclear power, much of the rest of the militarised world will quickly follow suit...starting with Japan and South Korea.
And then it just a matter of time until someone sneezes too close to the button.
Still I guess a million years hence it will be good to give the dinosaurs another run at it.