Reaganesque Press Conference: "We have provided South Korea with one 20 Kiloton Thermonuclear Weapon. It has the coordinates for Pyongyang, NK programmed into it. The South only has one control knob, it is a green button labeled "Launch." They cannot change the programmed coordinates. We have tested the delivery system hundreds of times, it will not miss the programmed coordinates by more than 6 inches and it will detonate. Thank you and good evening."
That would loosen Kimmie's bowels.
That wouldn't bother Kim Jong Il. He has bunkers that can survive a direct hit from an 20 KT warhead. They've been digging shelters for decades in NK.