A Somali girl in Mogadishu. The city was once a beautiful, seaside tourist town, but two decades of civil war has left it in ruins. Frank Langfitt /NPR hide caption

itoggle caption Frank Langfitt /NPR

A man dressed in Southern Sudan paraphernalia — a pin and tie — celebrates the announcement of the preliminary results of the independence referendum in Juba on Sunday. Phil Moore/AFP/Getty Images hide caption

itoggle caption Phil Moore/AFP/Getty Images

Sudanese supporters of secession wave regional flags and pro-separation placards upon the arrival of Sudan's President Omar al-Beshir at Juba airport on January 4, 2010. YASUYOSHI CHIBA/AFP/Getty Images hide caption

itoggle caption YASUYOSHI CHIBA/AFP/Getty Images

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

itoggle caption Peter Martell/Getty Images

A man sends money through the mobile phone service M-PESA in Kenya's capital, Nairobi, in 2007. M-PESA is having a clear economic impact, including boosting consumer spending in the countryside. Tony Karumba/Getty Images hide caption

itoggle caption Tony Karumba/Getty Images

Robert Bonifas (left) and Don Parrish on the road in Khartoum, the capital of Sudan. The pair are members of a travel website where people compete to see the world. Frank Langfitt/NPR hide caption

itoggle caption Frank Langfitt/NPR

At a staging area 20 miles south of Khartoum, a man carries his suitcase as he makes his way to a bus headed to Southern Sudan. A referendum in January could grant the south independence from Khartoum, but Southern Sudan is ill-equipped to provide for the tens of thousands of people are heading south ahead of the vote and promise of self-rule. Abd Raouf/AP hide caption

itoggle caption Abd Raouf/AP