Abyei

A woman dances as people celebrate referendum results in Abyei...A woman dances as people celebrate referendum results in Abyei October 31, 2013. Permanent residents of the disputed Abyei region overwhelmingly voted to join South Sudan on Thursday in a symbolic referendum that could antagonise heavily armed Arab nomads who drive their livestock through the area and claim it for Sudan.  REUTERS/Andreea Campeanu.

Andreea Campeanu/Reuters

Residents of Abyei in Sudan celebrate after the results of a referendum showed that the disputed region had voted overwhelmingly to join South Sudan. 

Women wait to vote inside a polling station located in a school during a referendum in the town of Abyei...Women wait to vote inside 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

Goran Tomasevic/Reuters

Women wait to vote in a referendum at a school in the town of Abyei, part of a remote and disputed border region of the same name whose residents are pressing ahead with the poll on whether to join Sudan or South Sudan, despite warnings it could trigger violence in the volatile area