U.S. Air Force Capt. Keith Grawert gives a crew brief in preparation for Joint Operation Access Exercise, Sept 7. JOAX is a week-long exercise to prepare the Air Force and the Army to respond to worldwide crises and contingencies. Grawert is a pilot from the 15th Airlift Squadron, 437th Airlift Wing at Joint Base Charleston. (U.S. Air Force photo/Staff Sgt. Nicholas Pilch)

U.S. Air Force pilots and loadmasters discuss airdrop procedures on a C-17 Globemaster III on the Joint Base Charleston - Air Base flightline Sept. 7. (U.S. Air Force photo/Staff Sgt. Nicholas Pilch)

U.S. Air Force Senior Airman Seth Dunworth runs through a preflight checklist on the ramp of a C-17 Globemaster III on the Joint Base Charleston - Air Base flightline Sept. 7. Dunworth is a loadmaster with the 15th Airlift Squadron, 437th Airlift Wing. (U.S. Air Force photo/Staff Sgt. Nicholas Pilch)

U.S. Army paratroopers from the 82nd Airborne Division descend to the ground after jumping out of a C-17 Globemaster III aircraft, over drop zone Sicily during Joint Operations Access Exercise at Ft. Bragg, N.C., Sept. 10. JOAX is a one-week exercise to prepare the Air Force and the Army to respond to worldwide crises and contingencies. (U.S. Air Force photo/Airman 1st Class James Richardson)

U.S. Army paratroopers from the 82nd Airborne Division descend to the ground after jumping out of a C-17 Globemaster III aircraft, over drop zone Sicily during Joint Operations Access Exercise at Ft. Bragg, N.C., Sept. 10. (U.S. Air Force photo/Airman 1st Class James Richardson )