why does anyone (including South Korea or the US) have to engage in ANY dialogue with North Korea--just ignore them--if they fire any kind of missile at any country in the region they know full well there regime with be annihilated in short order-and self preservation is their main goal anyway so they won't risk any "first strike" provocation that would spell the end of their existence. And also let nature take its course--by all accounts "Fat Boy" Kim is well on his way to a massive coronary before he turns 35 anyway--after his death there will be a massive power struggle with the new regime likely more open to better relations with all the major players in the region