A man holds a gun as he stands guard in the entrance of the Castanas neighborhood, in the southern outskirts of Guatemala City on July 19, 2011, to prevent an attack of the Salvatrucha gang. The residents of Castanas have been threatened and extorted by members of the Salvatrucha gang, and as a way to defend themselves, they decided to organize their own armed gang. AFP PHOTO / Johan ORDONEZ (Photo credit should read JOHAN ORDONEZ/AFP/Getty Images)
