Brazil's police officers stand in the alley where a fellow officer was shot dead at the Rocinha slum, in Rio de Janeiro, Brazil, Friday, Sept. 14, 2012. Diego Bruno Barbosa Henriques was shot and killed overnight Thursday while he and three fellow officers patrolled Rio de Janeiro's sprawling Rocinha slum. Government control over the shantytown is seen as strategic as Rio prepares to host the 2014 soccer World Cup and 2016 Olympics. (AP Photo/Silvia Izquierdo)