Police Chief William Bratton said Tuesday that a breakdown in command at an immigration rally led officers to use force to disperse a crowd, swing batons and fire hundreds of rubber bullets at demonstrators and journalists. "It was quite apparent ... it all broke down," Bratton said after the city's civilian Police Commission was given a minute-by-minute account of the May 1 melee. Bratton previously has acknowledged that a breakdown in command and communication led to the clash at MacArthur Park. The confrontation was broadcast on television stations worldwide. Police said they moved on protesters after being pelted with rocks...