Looters pillaged shops, homes and even attacked a fire station in the burning Chilean city of Concepcion, as rescuers try to find quake survivors. Police fired tear gas to try to disperse an angry crowd that set fire to the Bigger supermarket after they were prevented from entering. Black smoke billowed out over the ruins of Concepcion, one of the cities worst hit by Saturday's 8.8-magnitude quake, which has killed more than 720 people. "It's full, they have water, food, diapers, but the police won't let us go inside," complained one man standing next to the supermarket after a curfew...