Returnees from north Sudan wait in line for World Food Program (WFP) staff to start distributing food in Aweil in the northern Bahr el Ghazal state in south Sudan December 29, 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)