What kind of missiles are used in North Korea for offensive or defensive purposes? Does North Korea manufacture these missiles? If not, where are they allocated from? Does North Korea's local military have missiles capable of intercontinental travel?
If they send one of their missile subs anywhere near our waters I would almost guarantee we blow it out of the water. Our hunter killer subs are expert at tracking enemy subs and I'm pretty sure the moment one of them leaves port we'll know and there'll be one of our subs on its tail. I don't know if they have the technology to build and deploy a SLBM, but I'm pretty sure we aren't going to take the chance.