Boys who returned from north Sudan look at the World Food Program (WFP) food distribution in Wanjak near Aweil in the northern Bahr el Ghazal state in south Sudan December 30, 2010. People from Sudan's oil-producing south are widely expected to vote to split away to form Africa's newest nation in a referendum scheduled to take place on January 9, 2011 that was promised in a 2005 peace deal ending a civil war between north and south. REUTERS/Goran Tomasevic (SUDAN - Tags: POLITICS SOCIETY)