How about ignoring North Korea? It would be a Trojan Horse ploy in reverse. One evening the U.S. would pull its front line troops from the North/South border. By morning thousands of American forces would be at least 100 miles away. Over a period of weeks the U.S. garrison of 37,000 would be brought home and immediately spend their payrolls on our own soil. Leave a note to Kim Jong Il stating we no longer care about the actions of North Korea and as far as we are concerned his people can all starve to death. Also if he wants to nuke Japan so be it. We been there done that.
Kim Jong Il and his father before him are the mirror image of American foreign policy. Without our foreign policy Kim would be shucking clams on the coast.