A female inmate who is also a gang member sits in her cot at a prison in Quezaltepeque, on the outskirts of San Salvador June 2, 2012. The relentless tit-for-tat murders between El Salvador’s two largest street gangs – “Calle 18” and “Mara Salvatrucha” – made the country the most murderous in the world last year after neighboring Honduras, also ravaged by gang violence. That was until Garcia, from the Calle 18 (“18th Street”) gang, along with elders from the Mara Salvatruchadeclared an unprecedented truce that authorities say has cut the homicide rate in half in just four months. Picture taken June 2, 2012. To match Feature SALVADOR-GANGS/ REUTERS/Ulises Rodriguez (EL SALVADOR – Tags: CRIME LAW CIVIL UNREST)