Nearly 2,200 people have been arrested during college campus protests

LOS ANGELES (AP) — Police have arrested nearly 2,200 people during pro-Palestinian protests at college campuses across the United States in recent weeks, sometimes using riot gear, tactical vehicles and flash-bang devices to clear tent encampments and occupied buildings. One officer accidentally discharged his gun inside a Columbia University administration building while clearing out protesters camped inside, authorities said.No one was injured by the officer's mistake late Tuesday inside