On a slightly separate topic, it might have been prudent to just meet  Kim and talk to him. No big fanfare, no hoopla, few reporters and no expectations. Best way to start. Before this speech that might have been possible. Bring him to L.A or S.F. to watch a few NBA basketball games, he likes roundball, and have some casual conversations. Try to get native Korean speakers to squire him about. See the sights that interest him, then maybe visit him. After you get to know each other, let the diplomats responsible for that part of the world start talking amongst themselves. As the old Sufi expression goes, "take the least possible next step".