We're on the brink of war. IMO if I were the North Koreans I'd lob a few missiles into Guam before the assets there bomb me back into the Stone Age. If the North Koreans are hit heavily first, the risk is they let rip with a few nukes for good measure. That's probably the only reason they haven't been smoked already.
There must be a really interesting war game in the Pentagon at the moment. I wonder if they've got their jackboots on?