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

  Military police frisk motorcyclists as they patrol in the Paraisopolis slum in Sao Paulo, Brazil, early Tuesday, Nov. 13, 2012. At least 140 people have been murdered in South America's biggest city over the past two weeks in a rising wave of violence, Sao Paulo's Public Safety Department said Sunday. (AP Photo/Andre Penner)