A U.S. Air Force C-17 Globemaster III cargo aircraft taxis to its parking spot Bagram Airfield, Afghanistan, Sept. 25, 2012. The Globemaster III is a regular visitor to Bagram Airfield, transporting troops, equipment and supplies in and out of Afghanistan. (U.S. Air Force photo by Capt. Raymond Geoffroy)

A U.S. Air Force C-17 Globemaster III cargo aircraft taxis to its parking spot Bagram Airfield, Afghanistan, Sept. 25, 2012. The Globemaster III is a regular visitor to Bagram Airfield, transporting troops, equipment and supplies in and out of Afghanistan. (U.S. Air Force photo by Capt. Raymond Geoffroy)