A riot policeman gestures at the entrance of Mineira shantytown, while looking for traffickers that tried to invade the slum, 17 April 2007, in Rio de Janeiro, Brazil. Some 30 traffickers from a rival organization tried to enter the Mineira shantytown early this morning but were repeled by the police. According to the first police reports, twelve traffickers were killed. AFP PHOTO/Antonio SCORZA

Police officers leave Vila Cruzeiro Slum after one-hour gun fight, protected by tactical vehicle of special police force known as CORE, in Rio de Janeiro, southeastern Brazil, December 28, 2006 - Photo: Wilton Junior/Agencia Estado/AE

THIS PHOTO GOES WITH STORY "BRAZIL-COCAINE CONSUMER" BY PETER MUELLO - Police look for traffic dealers beside an armored vehicle with a drawing of a skull, called the "Big Skull" at the Complexo Alemao slum in Rio de Janeiro, Brazil, on Monday June 25, 2006. A black armored police vehicle called the Big Skull rolls through the labyrinthine alleys of Rio's Alemao slum complex. A loudspeaker warns kids to "get out of the street. There's going to be a shootout." It's no idle threat. In five months last year, 11 people _ including an 11-year-old boy _ were killed in raids on drug trafficking centers led by the Black Skull, Amnesty International said. (AP Photo/Silvia Izquierdo)

An armored vehicle with a drawing of a skull, called the "Big Skull" is seen during an operation at the Rosinha slum in Rio de Janeiro, Brazil, March 12, 2006. A black armored police vehicle called the Big Skull rolls through the labyrinthine alleys of Rio's Alemao slum complex. A loudspeaker warns kids to "get out of the street. There's going to be a shootout." It's no idle threat. In five months last year, 11 people _ including an 11-year-old boy _ were killed in raids on drug trafficking centers led by the Black Skull, Amnesty International said. (AP Photo/Silvia Izquierdo)

Army troops with an armored car guard the Rocinha shantytown during an operation looking for stolen weapons in Rio de Janeiro, Brazil, on Tuesday, March 14, 2006. The Brazilian army again surrounded the city's largest shantytown Tuesday, resuming the search for weapons stolen from its army barracks and denying it had planned to break off the effort. About 200 soldiers accompanied by special operations police sealed off the entrances to Rocinha, a sprawling mountainside shantytown perched over some of Rio de Janeiro's wealthiest neighborhoods. (AP Photo/Silvia Izquierdo)

Army troops with an armored car guard the Rocinha shantytown during an operation looking for stolen weapons in Rio de Janeiro, Brazil, on Tuesday, March 14, 2006. The Brazilian army again surrounded the city's largest shantytown Tuesday, resuming the search for weapons stolen from its army barracks and denying it had planned to break off the effort. About 200 soldiers accompanied by special operations police sealed off the entrances to Rocinha, a sprawling mountainside shantytown perched over some of Rio de Janeiro's wealthiest neighborhoods.The troops were searching for 10 assault rifles and one pistol that were stolen March 3 by seven gunmen wearing army-issue camouflage gear and ninja masks. (AP Photo/Silvia Izquierdo)

A local resident abandons the Rocinha shantytown whilst a Militarized Police (PM) armored car stands in position 16 February, 2006 in Rio de Janeiro, Brazil. At least six people killed and eight wounded left a firefight between two drug traffickers' gangs in the shantytown early Thursday. Some USD 3,5 million a week of drugs are commercialized at the Rocinha, which has a population of more than 150.000. AFP PHOTO/CAIO LEAL

A military police soldier is positioned on a vehicle before Special Operations Battalion 05 October 2002 in Rio de Janeiro where drug lord Fernandinho Beira-mar is imprisoned. Thousands of military police took to the streets of Rio de Janeiro 05 October on the eve of presidential and general elections which officials fear drug gangs may seek to disrupt and free Beira Mar, the jailed leader of the notorious Comando Vermelho drug gang. AFP PHOTO/Bruno DOMINGOS

Two angents of the militarized police(PM) of Rio de Janeiro, Brazil, supervise the bike route of Copacabana beach, 11 Septemeber 2002, observed by a group of tourists. The PM began to use today six scooters to guard the 6 km of the famous beach, one of the mayor tourist sites of this city. AFP PHOTO/Antonio SCORZA Dos agentes de la polic?a militarizada (PM) de Rio de Janeiro, Brasil, patrullan la ciclov?a de la playa de Copacabana, el 11 de setiembre de 2002. La PM de Rio empezo hoy a utilizar seis "scooters" electricos para patrullar los 6 km de la famosa playa, uno de los principales puntos tur?sticos de esta ciudad. AFP PHOTO/Antonio SCORZA