The sabre rattling on both sides is getting worrisome.  It is some comfort that China seems to be exasperated with the Dear Leader, since it means that global conflict is likely not on the near horizon.  the missile failure and the seeming inability to develop long range nuclear weapons is also a plus.  

I am hopeful that Trump and his gang of fools stick with tough economic sanctions and couple them with diplomacy.  The ban on the airline and a naval blockade sound like good steps.  

But if Kim decides to nuke the South because his missiles won't hit the US -- or if he succeeds in submarine development so that miniaturization of warheads is no longer needed -- it could get very scary very quickly.