Nation: Occupied Berkeley

The ominous motor noise was at first too faint to be heard by the crowd in Sproul Plaza below. Five hundred University of California students and other young people milled about, some lolling on the grass, some gibing at and singing to the National Guardsmen who surrounded them. Gradually, the grinding sound enveloped the plaza. A bulbous green helicopter swooped in over the treetops, belching white puffs of a potent military tear gas called CS. The powder settled indiscriminately on demonstrators and bystanders, drifting into classrooms and the campus hospital. The crowd in Sproul Plaza tried to flee, but gas-masked Guardsmen...