U.S. Air Force C-17 Globemaster IIIs fly in formation. U.S. Air Force C-17 Globemaster IIIs from the 437th and 315th Airlift Wings, Charleston Air Force Base, S.C., fly in formation during a strategic brigade airdrop exercise involving a 13 multi-ship formation on Dec. 18, 2008. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 649290-N-RJN13-966.jpg Photo Gallery