On the topic of North Korea. North Korea isn't a problem.
Even if they could attack us, and did attack us, even if by some miracle of theirs they won -- they STILL wouldnt gain anything from it economically.

Because of that, they will not attack us and that is why you see us saying it will be resolved peacefully, because we know that and they know that we know that.

Simple.

Blowing up some of our **** would only further isolate them and make other country's stop giving them the aid they already receive.

However, threatening us might make us give them a favor or two just so they shut up.