A U.S. Air Force airman guides a C-17 Globemaster III aircraft. A U.S. Air Force airman with the 437th Aerial Maintenance Squadron guides a C-17 Globemaster III aircraft during a large formation exercise at Fort Polk, La., on Dec. 16, 2010. Airmen from airlift squadrons at Joint Base Charleston and soldiers from the Operations Group, Joint Readiness Training Center at Fort Polk conducted aerial refueling, personnel drops and other airborne operations during the exercise. SHARE IMAGE: Download Image: Full Size (0.05 MB) Photo By: VIRIN: 096415-A-HPX06-966.jpg Photo Gallery