We can't sit on our hands like Obama did for (8) years. Under his watch he allowed Iran and NK to continue their development of nuclear weapons thus putting America in harms way.
I have an idea...
We respond militarily
But first, we must take steps to mitigate loss of life in South Korea.
If NK launches, or conduct other ballistic/nuclear test, our order of progression should be;
1- We officially notify North Korea of our intent to destroy their assets relative to nuclear and ballistic development. Our response will be carried out if they conduct (1) more missile launch or test of any kind
2- We start the immediate evacuation (voluntary) of the South Korea. Yes, this will be a logistic nightmare beyond all compare. Hopefully, other Nations (certainly) our allies will assist in this massive operation.
3- Move our military troops off the Korean peninsula to an area where our rapid response, via airborne paratroopers, can be delivered. Ground invasion to follow
4- Move multiple Naval battle groups to the area for a massive conventional strike
We have to do something. The result of inaction WILL cost more lives than a pre-emptive strike.
We are at the crossroads and history will be our judge
-Geaux
North Korea has developed nuclear capabilities as a deterrent, as has every other country with nukes. What our allies in the area, South Korea and Japan, want is for US to stop provoking THEM further with increased saber rattling on our side of the border. This fuels NK's determination to protect itself. NK is not so unreasonable as to carry out a nuclear strike, since it would be suicide. US, Russia, China, Great Britain, France, Israel, India and Pakistan all have nuclear weapons. Are we having the vapors over any of them?
I think it would be wonderful if the nations of the world, working in unison, could dissuade NK from proceeding with its nuclear weapons program. I fear it's too late for that and what to do now is to approach them as a country that does, indeed, have nukes. Bring them back into the global discussion; show them how growing their nation's prosperity would be more helpful than fostering global destruction.