Last year, Donald Trump called Kim Jong-un a ‘little rocket man’ and tweeted a photo boasting that his own nuclear button was larger and more effective than that of the North Korean leader. Yet sometime over the next six weeks the two men will confound those who saw them as warmongers intent on bringing the world to the brink of nuclear conflict by meeting in a yet-to-be disclosed location — ending two decades in which US-North Korean dialogue has been virtually nonexistent.