When a music festival becomes a history lesson: New York City stalwart rockers The Strokes made headlines with their second set of the final weekend at Coachella. They ended with a song they rarely play, “Oblivius,” and its chorus “What side you standing on?” as a video montage of US and CIA involvement in overseas assassinations and regime change efforts played on screens behind them with captions. Reaction has been mixed, says Host Marco Werman.