on May 12, 2006, São Paulo came under a violent and coordinated attack. The attackers moved on foot, and by car and motorbike. They were not rioters, revolutionaries, or the graduates of terrorist camps. They were anonymous young men and women, dressed in ordinary clothes, unidentifiable in advance, and indistinguishable afterward. Wielding pistols, automatic rifles, and firebombs, they emerged from within the city, struck fast, and vanished on the spot. Their acts were criminal, but the attackers did not loot, rob, or steal. They burned buses, banks, and public buildings, and went hard after the forces of order—gunning down the police in their neighborhood posts, in their homes, and on the streets.