Given that Barak and his administration lack the talent and intellect of JFK, not to mention the patriotism and commitment to "the American Way" (yes, in spite of everything else about him and his brothers, and being a wealthy overlord Democrat looking to control the serfs), I see no possibility of the current government being able to do much more than whine and whinge.
My estimate of Barak is that by Monday night he will still be doing the wide-eyed "what the heck just happened" blink, while Hillary will be advising him to look to the French to take the lead on multi-national discussions with NK.
The UN Security Council is going to meet on Monday. Will our ambassador even have the guts to use the USA's veto power to prevent a resolution that is less than outright condemnation with sanctions? Hah! Even I can't delude myself into that dream.
And as for Japan's promise to "respond responsibly" at the UN meeting - the only responsible response I can imagine is asking to be released from the post-WWII self-defense-only military. I'm pretty comfortable that their empire seeking days are over.
North Korea has in fact entered the nuclear family. They are poised, as soon as they do some tweaking of ther delivery system, to replace India/Pakistan as the major worry in the world for setting off one or more of the things, as well as being a source for smaller devices that can be supplied to the freedom-loving peoples' revolutionaries around the world in their quest to throw off the yoke of western domination.
There was a really cheesy movie about 15-20 years ago about some US high-drag/low-speed warrior who infiltrated NK and blew up their nuclear bomb plant. Maybe we ought to dust it off and start training up our troops on how it could be done in real life.
stay safe. And this time I really mean it.
skidmark