While NK has escalated thing a bit more than usually this is their same old MO. Need food and energy? Threaten the world and you will get what you want. It aint the first time they have done it and it always works for them so why would anyone be surprised by this?
One of two things will happen. We and others will give NK what they are looking for (food energy, money) and they will stop this nonsense again for a while, or they will keep beating their chest and nothing will come from it.
Ever see the movie "The Mouse That Roared?"
I can see "the Obama" surrendering to NK!!