For the Obama administration, North Korea has followed a familiar script. It has made trouble, exploding a nuclear device. It has made nice, inviting U.S. officials to visit. And it has made a mess of growing food, needing handouts from the rich...

On the evening of July 10, Bonogit Hussain, a 29-year-old Indian man, and Hahn Ji-seon, a female Korean friend, were riding a bus near Seoul when a man in the back began hurling racial and sexist slurs at them.