Southern Sudanese rally on the streets of the southern capital, Juba, on Dec. 9, marking the one-month countdown until a landmark independence referendum is due. The vote could see Sudan's autonomous and mostly Christian south break away from the predominantly Arab and Muslim north. Peter Martell/Getty Images hide caption

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Former NBA star Manute Bol, shown speaking at a March 2006 Sudan Freedom Walk rally in Philadelphia, played 10 seasons in the NBA and later founded a humanitarian group that promotes reconciliation in Sudan. He died Saturday at a Virginia hospital at age 47. Matt Rourke/AP hide caption

itoggle caption Matt Rourke/AP