SEOUL, South Korea — When the armored train carrying Kim Jong-un back from his summit meeting with President Trump in Vietnam reached Pyongyang Station at 3:08 a.m. Tuesday, throngs of flower-waving North Koreans greeted their leader with “boundless emotions and excitement,” the country’s state-run media said.
But Mr. Kim returned home empty-handed — without relief from international sanctions — prompting the question of what he will do next: Particularly, will he resume his nuclear and missile brinkmanship to reassert his leverage?