BRAZIL-OLY-2016-CRIME-VIOLENCE-SECURITY-ARMY-POLICE

Brazilian marines leave the Mare favela complex as they are completely relieved by the police, more than a year after being deployed to ramp up security in an area prone to gang warfare and drug trafficking ahead of last year's World Cup and South America's first ever Olympiad, in Rio de Janeiro, on June 30, 2015. In April, despite a recent upsurge in urban violence, Brazilian soldiers began to withdraw from the sprawling group of slums, handing back responsibility for law and order to military police who insist they will manage to pacify slum areas in the run-up to next year's Olympics. AFP PHOTO / CHRISTOPHE SIMON (Photo credit should read CHRISTOPHE SIMON/AFP via Getty Images)