Even as Southern Sudan votes in an independence referendum this week, the fear of war hasn't entirely faded away. The south is likely to vote to secede from greater Sudan, and the many political tensions over how exactly to do so -- where the border is drawn, who gets what oil revenues, and so forth -- could ratchet up into a renewed civil war between north and south. Or Southern Sudanese factions could turn on one another as they jockey to rule in a new, independent state.