A woman votes in a polling station located in a school during a referendum in the town of Abyei October 28, 2013. Residents of the remote and disputed Abyei border region said they would press ahead with their own referendum on whether to join Sudan or South Sudan, despite warnings it could trigger violence in the volatile area. REUTERS/Goran Tomasevic (ABYEI – Tags: CIVIL UNREST POLITICS ELECTIONS)