The TV images that would shake American politics like none had since Watts in 1965 began innocuously enough: on NBC, above a chyron reading taped , it looked like a busy New York rush hour, though some are holding handkerchiefs to their faces. [ … ] [T]he hemmed-in cops threw tear-gas canisters across the street at the apex of the marchers' U-turn [ … ] grant park, chicago, illinois , the chyron now reads, and a woman's voice says, "The kids are still marching, it looks like a whole gathering of people with terrible colds"; [ … ]