عقبات المفاوضات السورية

United Nations (U.N.) Special Envoy for Syria Staffan de Mistura looks on during a news conference in Damascus, November 11, 2014. A common threat posed by Islamic State militants to Syria's warring factions may help push government and rebel forces toward local truces, de Mistura said in an interview published on Tuesday. De Mistura is pushing an initiative to create «incremental freeze zones» to stop localised fighting and improve aid access, starting in the northern city of Aleppo. REUTERS/Omar Sanadiki (SYRIA - Tags: POLITICS CONFLICT CIVIL UNREST HEADSHOT)