CHARLESTON, S.C. (AFPN) -- A formation of 17 C-17 Globemaster IIIs fly over the Blue Ridge Mountains in Virginia during low-level tactical training. The C-17s, assigned to the 437th and 315th Airlift Wings here, were part of the largest formation in history from a single base and demonstrated the strategic airdrop capability of the Air Force. (U.S. Air Force photo by Staff Sgt. Jacob Bailey)