Senior Airman Jeremy Kaser marshals a C-17 Globemaster III aircraft during a large formation exercise. U.S. Air Force Senior Airman Jeremy Kaser marshals a C-17 Globemaster III aircraft during a large formation exercise at Polk, La., on Dec. 15, 2010. Kaser is a crew chief assigned to the 437th Aircraft Maintenance Squadron, Joint Base Charleston, S.C. Airmen from Joint Base Charleston and soldiers assigned to the Joint Readiness Training Center at Fort Polk conducted aerial refueling and troop jumps to simulate the seizure of a remote airfield. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 776808-Y-GPL22-364.jpg Photo Gallery