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Army soldiers take position during an operation to occupy the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian Army soldiers moved into the Mare slum complex early Saturday in a bid to improve security and drive out the heavily armed drug gangs that have ruled the sprawling slum for decades. (AP Photo/Silvia Izquierdo) ( Brazil Rio Violence )

Luiza Lopes, 32, cries for her son at the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. According to Luiza she was not allowed to take her 9th son home after she gave birth to him because of her drug issues. According to her she went to treatment and is not using drugs anymore but her son remains in a shelter. More than 2,000 Brazilian soldiers stormed into the slum complex Saturday with armored personnel carriers and helicopters in a bid to improve security two months before the start of the World Cup. (AP Photo/Felipe Dana) ( Brazil Rio Violence )

Brazilian soldiers patrol Vila Pinheiro --part of the Mare shantytown complex near the Galeao (Antonio Carlos Jobim) international airport-- in the north suburb of Rio de Janeiro on April 5, 2014. Thousands of soldiers --including some 2,000 paratroopers, 450 sailors and 200 military police-- in armored vehicles, trucks and on foot entered one of Rio de Janeiro's most notorious slums to provide security less than three months before the World Cup and until July 30. CHRISTOPHE SIMON/AFP/Getty Images ( 528689535 )

Army soldiers walk at a roof while residents play soccer during an operation to occupy the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian Army soldiers moved into the Mare slum complex early Saturday in a bid to improve security and drive out the heavily armed drug gangs that have ruled the sprawling slum for decades. (AP Photo/Silvia Izquierdo) ( Brazil Rio Violence )

A navy soldier patrols on a soccer field during an operation to occupy the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian Army soldiers moved into the Mare slum complex early Saturday in a bid to improve security and drive out the heavily armed drug gangs that have ruled the sprawling slum for decades.(AP Photo/Felipe Dana) ( APTOPIX Brazil Rio Violence )

A navy soldier enters to occupy the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian Army soldiers moved into the Mare slum complex early Saturday in a bid to improve security and drive out the heavily armed drug gangs that have ruled the sprawling slum for decades.(AP Photo/Felipe Dana) ( Brazil Rio Violence )

A woman hangs clothes to dry while a navy soldier enters to occupy the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian Army soldiers moved into the Mare slum complex early Saturday in a bid to improve security and drive out the heavily armed drug gangs that have ruled the sprawling slum for decades.(AP Photo/Felipe Dana) ( Brazil Rio Violence )

An Army soldiers takes position while during an operation to occupy the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian Army soldiers moved into the Mare slum complex early Saturday in a bid to improve security and drive out the heavily armed drug gangs that have ruled the sprawling slum for decades. (AP Photo/Silvia Izquierdo) ( APTOPIX Brazil Rio Violence )

Residents walk past an armored vehicle during an operation to occupy the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian Army soldiers moved into the Mare slum complex early Saturday in a bid to improve security and drive out the heavily armed drug gangs that have ruled the sprawling slum for decades. (AP Photo/Silvia Izquierdo) ( Brazil Rio Violence )

Navy soldiers gather for instruction during an operation to occupy the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian Army and Navy soldiers moved into the Mare slum complex early Saturday in a bid to improve security and drive out the heavily armed drug gangs that have ruled the sprawling slum for decades.(AP Photo/Felipe Dana) ( Brazil Rio Violence )

A couple drink beer while Army soldiers enter to occupy the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian Army soldiers moved into the Mare slum complex early Saturday in a bid to improve security and drive out the heavily armed drug gangs that have ruled the sprawling slum for decades. (AP Photo/Silvia Izquierdo) ( Brazil Rio Violence )

A boy rides his bike in a poor area of the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian soldiers stormed into the slum complex Saturday with armored personnel carriers and helicopters in a bid to improve security two months before the start of the World Cup. (AP Photo/Felipe Dana) ( Brazil Rio Violence )

Army soldiers take position during an operation to occupy the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian Army soldiers moved into the Mare slum complex early Saturday in a bid to improve security and drive out the heavily armed drug gangs that have ruled the sprawling slum for decades. (AP Photo/Silvia Izquierdo) ( Brazil Rio Violence )

A boy watches from his home, where the wall is covered with holes from bullets of past shootings, during an operation to occupy the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian Army soldiers moved into the Mare slum complex early Saturday in a bid to improve security and drive out the heavily armed drug gangs that have ruled the sprawling slum for decades. (AP Photo/Silvia Izquierdo) ( Brazil Rio Violence )

Army soldiers walk beside beer crates during an operation to occupy the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian Army soldiers moved into the Mare slum complex early Saturday in a bid to improve security and drive out the heavily armed drug gangs that have ruled the sprawling slum for decades. (AP Photo/Silvia Izquierdo) ( Brazil Rio Violence )

A girl lays on a mattress placed under a bridge in a poor area of the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian soldiers stormed into the slum complex Saturday with armored personnel carriers and helicopters in a bid to improve security two months before the start of the World Cup. (AP Photo/Felipe Dana) ( Brazil Rio Violence )

Two sisters watch television inside their home in a poor area of the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian soldiers stormed into the Rio de Janeiro slum complex Saturday with armored personnel carriers and helicopters in a bid to improve security two months before the start of the World Cup. (AP Photo/Felipe Dana) ( Brazil Rio Violence )

Brazilian soldiers patrol Vila Pinheiro --part of the Mare shantytown complex near the Galeao (Antonio Carlos Jobim) international airport-- in the north suburb of Rio de Janeiro on April 5, 2014. Thousands of soldiers --including some 2,000 paratroopers, 450 sailors and 200 military police-- in armored vehicles, trucks and on foot entered one of Rio de Janeiro's most notorious slums to provide security less than three months before the World Cup and until July 30. CHRISTOPHE SIMON/AFP/Getty Images ( 528689595 )

Brazilian soldiers patrol the street during security operations in Parque Uniao --part of the Mare shantytown complex near the Galeao (Antonio Carlos Jobim) international airport-- in the north suburb of Rio de Janeiro on April 5, 2014. Thousands of soldiers --including some 2,000 paratroopers, 450 sailors and 200 military police-- in armored vehicles, trucks and on foot entered one of Rio de Janeiro's most notorious slums to provide security less than three months before the World Cup and until July 30. CHRISTOPHE SIMON/AFP/Getty Images ( 528691949 )

Brazilian soldiers patrol Vila Pinheiro--part of the Mare shantytown complex near the Galeao (Antonio Carlos Jobim) international airport-- in the north suburb of Rio de Janeiro on April 5, 2014. Thousands of soldiers --including some 2,000 paratroopers, 450 sailors and 200 military police-- in armored vehicles, trucks and on foot entered one of Rio de Janeiro's most notorious slums to provide security less than three months before the World Cup and until July 30. CHRISTOPHE SIMON/AFP/Getty Images ( 528689390 )

Brazilian soldiers stand guard during security operations in Vila Pinheiro --part of the Mare shantytown complex near the Galeao (Antonio Carlos Jobim) international airport-- in the north suburb of Rio de Janeiro on April 5, 2014. Thousands of soldiers --including some 2,000 paratroopers, 450 sailors and 200 military police-- in armored vehicles, trucks and on foot entered one of Rio de Janeiro's most notorious slums to provide security less than three months before the World Cup and until July 30. CHRISTOPHE SIMON/AFP/Getty Images ( 528689645 )

Brazilian soldiers patrol the street during security operations in Parque Uniao --part of the Mare shantytown complex near the Galeao (Antonio Carlos Jobim) international airport-- in the north suburb of Rio de Janeiro on April 5, 2014. Thousands of soldiers --including some 2,000 paratroopers, 450 sailors and 200 military police-- in armored vehicles, trucks and on foot entered one of Rio de Janeiro's most notorious slums to provide security less than three months before the World Cup and until July 30. CHRISTOPHE SIMON/AFP/Getty Images ( 528689789 )

A woman shops for sunglasses at the Piscinao de Ramos artificial lake, part of the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian soldiers stormed into the slum complex Saturday with armored personnel carriers and helicopters in a bid to improve security two months before the start of the World Cup. (AP Photo/Felipe Dana) ( Brazil Rio Violence )

A man naps outside his home in a poor area of the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian soldiers stormed into the slum complex Saturday with armored personnel carriers and helicopters in a bid to improve security two months before the start of the World Cup. (AP Photo/Felipe Dana) ( Brazil Rio Violence )

Two men walk beside a sign that reads "Peace" on a wall covered with holes from bullets of past shootings, during an operation to occupy the Mare slum complex in Rio de Janeiro, Brazil, Saturday, April 5, 2014. More than 2,000 Brazilian Army soldiers moved into the Mare slum complex early Saturday in a bid to improve security and drive out the heavily armed drug gangs that have ruled the sprawling slum for decades. (AP Photo/Silvia Izquierdo) ( Brazil Rio Violence )

Brazilian soldiers patrol the street during security operations in Vila Pinheiro --part of the Mare shantytown complex near the Galeao (Antonio Carlos Jobim) international airport-- in the north suburb of Rio de Janeiro on April 5, 2014. Thousands of soldiers --including some 2,000 paratroopers, 450 sailors and 200 military police-- in armored vehicles, trucks and on foot entered one of Rio de Janeiro's most notorious slums to provide security less than three months before the World Cup and until July 30. CHRISTOPHE SIMON/AFP/Getty Images ( 528698111 )