U.S. Air Force C-17 Globemaster III aircraft participate in a large formation exercise. U.S. Air Force C-17 Globemaster III aircraft participate in a large formation exercise over the coast of Charleston, S.C., on Dec. 21, 2006. Twenty C-17s, assigned to the 437th and 315th Airlift Wings, Charleston Air Force Base, S.C., took part in the largest formation in history from a single base while demonstrating strategic airdrop capabilities. SHARE: Download: Full Size (0.01 MB) Credit: VIRIN: 559336-O-ZXP43-275.jpg Photo Gallery