Article Photos: Sao Paulo could face gang war with truce collapse 3/6

  A police vehicle sits parked near the Brasilandia slum, behind, in Sao Paulo, Brazil, Wednesday, Nov. 14, 2012. The city has seen nearly 150 homicides in the past two weeks, including a 13-year-old boy and a female police officer in the violent Brasilandia slum. South America’s biggest city is living its most violent days in six years, as a powerful drug gang and police carry out what security experts call retribution killings against one another. (AP Photo/Andre Penner)