Step #1 - make absolutely sure we know where ALL of NK's submarines are - always.

Step #2 - give NK a reason to have one of those huge parades - have no westerners there to promote it. Suggest in the press the parade was not as big as last time (like with Trump).

Step #3 - When NK has its next "big" parade they will have most of the weapons, troops and command structure on display - "accidentally" have some weapons blow up while simultaneously destroying ALL submarines . 

Step #4 -  send MOABs and Bunker Busters to bomb all NK's nuclear facilities plus dirty bombs to make sure they are never rebuilt.

Step #5 - Invite whoever of the ruling class is left to discussions at one of Trumps resorts (not in Scotland please). Bomb it too!

Step #6. Give whatever is left of NK  to SK (if they want it).  Send lots of food to NK. Treat all NK children to a trip to Disneyland (not the French one) Take all the money currently being spent on middle east peace and give it to NK to help it rebuild.