Libyan rebel fighters advance in their tank about 60 miles east of the town of Sirte on Tuesday. Sirte is Moammar Gadhafi's hometown and the last bastion of his loyalist forces. Eric Feferberg/AFP/Getty Images hide caption

itoggle caption Eric Feferberg/AFP/Getty Images

A Syrian military tank takes position in a residential street in the central city of Homs Monday. Government troops reportedly are defecting to join the activists. Joesph Eid/AFP/Getty Images hide caption

itoggle caption Joesph Eid/AFP/Getty Images

Rex Goodnight (right) works with contractors in Afghanistan. His program, Afghanistan Reachback, works to create buildings using the resources Afghans actually have. Courtesy of Rex Goodnight hide caption

itoggle caption Courtesy of Rex Goodnight

Syrian street vendors display their goods in downtown Damascus on Tuesday. Syria's economy was hit hard initially by the anti-government uprising. It has bounced back, but now the U.S. is urging the European Union to join in banning imports of crude oil from Syria. Joseph Eid/AFP/Getty Images hide caption

itoggle caption Joseph Eid/AFP/Getty Images