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 (EL SALVADOR - Tags: CRIME LAW CIVIL UNREST ANNIVERSARY)