North Korean propaganda is many things, but it’s not subtle. Case in point: A new video, unveiled at a recent musical performance in honor of Kim Il Sung, shows missiles leaving a generic U.S. city in flames. In the footage, a handful of missiles arc over the Pacific, then explode into a giant fireball. It ends with a burning American flag, superimposed over a cemetery of white crosses. “When the performance was over, all the performers and participants in the military parade broke into enthusiastic cheers of ‘hurrah!’ ” the state-run KCNA news agency reported. Kim Jong Un smiled and waved afterward