US Vice President Joe Biden (R) meets with Southern Sudan President Salva Kiir on June 9, 2010 at the US ambassador's residence in Nairobi, on the second leg of his trip to Africa. Biden met with officials from southern Sudan, where a referendum on self-determination that could cause major upheaval in the region is scheduled for January. AFP PHOTO / SIMON MAINA (Photo credit should read SIMON MAINA/AFP via Getty Images)
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