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Members of Mara Salvatrucha (MS13), workout Monday, March 4, 2013, in the gym of the Criminal Center of Ciudad Barrios, San Miguel, 160 km east of San Salvador, after one year of cessation of the violence between the rivalry of two large gangs in El Salvador, MS13 and 18 st. El Salvador, a small country of six million people, is brimming with an estimated 50,000 street gang members, plus another 10,000 who are behind bars. Since the first truce took effect about a year ago, the average daily death toll from gang-related violence has gone down from 14 to five. Marvin RECINOS/AFP/Getty Images

Members of Mara Salvatrucha (MS13), held on Monday, March 4, 2013, in the Criminal Center of Ciudad Barrios, San Miguel, 160 km east of San Salvador, after one year of cessation of the violence between the rivalry of two large gangs in El Salvador, MS13 and 18 st. El Salvador, a small country of six million people, is brimming with an estimated 50,000 street gang members, plus another 10,000 who are behind bars. Since the first truce took effect about a year ago, the average daily death toll from gang-related violence has gone down from 14 to five. Marvin RECINOS/AFP/Getty Images

Jailed gang members play a game of table tennis at the maximum security jail of Izalco in Sonsonate March 5, 2013. Jailed members of the country's two most powerful gangs MS-13 and the 18th Street gang (Mara 18), members of civic organizations and Bishop Fabio Colindres celebrated mass to mark the first anniversary since the two gangs signed a truce in March 2012 in an effort to reduce violent crimes in the country. REUTERS/Ulises Rodriguez

Jailed gang members play a board game at the maximum security jail of Izalco in Sonsonate March 5, 2013. Jailed members of the country's two most powerful gangs MS-13 and the 18th Street gang (Mara 18), members of civic organizations and Bishop Fabio Colindres celebrated mass to mark the first anniversary since the two gangs signed a truce in March 2012 in an effort to reduce violent crimes in the country. REUTERS/Ulises Rodriguez

Police walk outside the maximum security jail of Izalco in Sonsonate March 5, 2013. Jailed members of the country's two most powerful gangs MS-13 and the 18th Street gang (Mara 18), members of civic organizations and military Bishop Fabio Colindres celebrated mass to mark the first anniversary since the two gangs signed a truce in March 2012 in an effort to reduce violent crimes in the country. REUTERS/Stringer

A board with pictures of jailed gang members is seen at the maximum security jail of Izalco in Sonsonate March 5, 2013. Jailed members of the country's two most powerful gangs MS-13 and the 18th Street gang (Mara 18), members of civic organizations and Bishop Fabio Colindres celebrated mass to mark the first anniversary since the two gangs signed a truce in March 2012 in an effort to reduce violent crimes in the country. REUTERS/Ulises Rodriguez

Members of Mara Salvatrucha (MS13), held on Monday, March 4, 2013, in the Criminal Center of Ciudad Barrios, San Miguel, 160 km east of San Salvador, after one year of cessation of the violence between the rivalry of two large gangs in El Salvador, MS13 and 18 st. El Salvador, a small country of six million people, is brimming with an estimated 50,000 street gang members, plus another 10,000 who are behind bars. Since the first truce took effect about a year ago, the average daily death toll from gang-related violence has gone down from 14 to five. Marvin RECINOS/AFP/Getty Images

Members of Mara Salvatrucha (MS13), held on Monday, March 4, 2013, in the Criminal Center of Ciudad Barrios, San Miguel, 160 km east of San Salvador, after one year of cessation of the violence between the rivalry of two large gangs in El Salvador, MS13 and 18 st. El Salvador, a small country of six million people, is brimming with an estimated 50,000 street gang members, plus another 10,000 who are behind bars. Since the first truce took effect about a year ago, the average daily death toll from gang-related violence has gone down from 14 to five. Marvin RECINOS/AFP/Getty Images

A member of the Mara Salvatrucha (MS13), is pictured on Monday, March 4, 2013, in the Criminal Center of Ciudad Barrios, San Miguel, 160 km east of San Salvador, one year after the cessation of the violence between the rivalry of two large gangs in El Salvador, MS13 and 18 st. El Salvador, a small country of six million people, is brimming with an estimated 50,000 street gang members, plus another 10,000 who are behind bars. Since the first truce took effect about a year ago, the average daily death toll from gang-related violence has gone down from 14 to five. Marvin RECINOS/AFP/Getty Images

Bishop Fabio Colindres (R) stands with a jailed gang member at the maximum security jail of Izalco in Sonsonate March 5, 2013. Jailed members of the country's two most powerful gangs MS-13 and the 18th Street gang (Mara 18), members of civic organizations and Colindres celebrated mass to mark the first anniversary since the two gangs signed a truce in March 2012 in an effort to reduce violent crimes in the country. REUTERS/Ulises Rodriguez

Members of the Mara Salvatrucha (MS) gang are pictured Monday, March 4, 2013, at the gym of a prison in San Miguel, 160 km east of San Salvador, after one year of cessation of the violence between the rivalry of two large gangs in El Salvador, MS13 and 18 st. El Salvador, a small country of six million people, is brimming with an estimated 50,000 street gang members, plus another 10,000 who are behind bars. Since the first truce took effect about a year ago, the average daily death toll from gang-related violence has gone down from 14 to five. Marvin RECINOS/AFP/Getty Images

Members of Mara Salvatrucha (MS13), held on Monday, March 4, 2013, in the Criminal Center of Ciudad Barrios, San Miguel, 160 km east of San Salvador, after one year of cessation of the violence between the rivalry of two large gangs in El Salvador, MS13 and 18 st. El Salvador, a small country of six million people, is brimming with an estimated 50,000 street gang members, plus another 10,000 who are behind bars. Since the first truce took effect about a year ago, the average daily death toll from gang-related violence has gone down from 14 to five. Marvin RECINOS/AFP/Getty Images

Members of Mara Salvatrucha (MS13), workout Monday, March 4, 2013, in the gym of the Criminal Center of Ciudad Barrios, San Miguel, 160 km east of San Salvador, after one year of cessation of the violence between the rivalry of two large gangs in El Salvador, MS13 and 18 st. El Salvador, a small country of six million people, is brimming with an estimated 50,000 street gang members, plus another 10,000 who are behind bars. Since the first truce took effect about a year ago, the average daily death toll from gang-related violence has gone down from 14 to five. Marvin RECINOS/AFP/Getty Images

Jailed gang members are seen inside a cell at the maximum security jail of Izalco in Sonsonate March 5, 2013. Jailed members of the country's two most powerful gangs MS-13 and the 18th Street gang (Mara 18), members of civic organizations and Bishop Fabio Colindres celebrated mass to mark the first anniversary since the two gangs signed a truce in March 2012 in an effort to reduce violent crimes in the country. REUTERS/Ulises Rodriguez

A jailed gang member gets a tattoo done by a fellow inmate at the maximum security jail of Izalco in Sonsonate March 5, 2013. Jailed members of the country's two most powerful gangs MS-13 and the 18th Street gang (Mara 18), members of civic organizations and Bishop Fabio Colindres celebrated mass to mark the first anniversary since the two gangs signed a truce in March 2012 in an effort to reduce violent crimes in the country. REUTERS/Ulises Rodriguez

Jailed gang members play with a set of hand-made cards at the maximum security jail of Izalco in Sonsonate March 5, 2013. Jailed members of the country's two most powerful gangs MS-13 and the 18th Street gang (Mara 18), members of civic organizations and Bishop Fabio Colindres celebrated mass to mark the first anniversary since the two gangs signed a truce in March 2012 in an effort to reduce violent crimes in the country. REUTERS/Ulises Rodriguez

Jailed gang members stand inside the maximum security jail of Izalco in Sonsonate March 5, 2013. Jailed members of the country's two most powerful gangs MS-13 and the 18th Street gang (Mara 18), members of civic organizations and Bishop Fabio Colindres celebrated mass to mark the first anniversary since the two gangs signed a truce in March 2012 in an effort to reduce violent crimes in the country. REUTERS/Ulises Rodriguez

A jailed gang member hangs up laundry at the maximum security jail of Izalco in Sonsonate March 5, 2013. Jailed members of the country's two most powerful gangs MS-13 and the 18th Street gang (Mara 18), members of civic organizations and Bishop Fabio Colindres celebrated mass to mark the first anniversary since the two gangs signed a truce in March 2012 in an effort to reduce violent crimes in the country. REUTERS/Ulises Rodriguez

A jailed gang member sits at the maximum security jail of Izalco in Sonsonate March 5, 2013. Jailed members of the country's two most powerful gangs MS-13 and the 18th Street gang (Mara 18), members of civic organizations and Bishop Fabio Colindres celebrated mass to mark the first anniversary since the two gangs signed a truce in March 2012 in an effort to reduce violent crimes in the country. REUTERS/Ulises Rodriguez