A 927th Air Refueling Wing KC-135 Stratotanker soars overhead after refueling a C-17 Globemaster III July 1, 2014. C-17 Globemaster IIIs rely on aerial refueling to complete long-distance missions into and out of the theater of operations. (U.S. Air Force photo/ Airman 1st Class Clayton Cupit)

An Airman inspects the landing gear of a C-17 Globemaster III July 1, 2014, on the flight line at Joint Base Charleston, South Carolina. The maintainers perform checks and maintenance around the clock to ensure the aircraft are ready to fly. (U.S. Air Force photo/ Airman 1st Class Clayton Cupit)

Col. Tony Schenk, 437th Operations Group deputy commander, and Lt. Col. Russ Catanach, 315th Operations Group vice commander, perform pre-flight checks prior to take-off July 1, 2014, on the flight line at Joint Base Charleston, South Carolina. Schenk and Catanach were both members of the initial cadre of C-17 pilot teams that flew C-17s to Charleston Air Base more than 20 years ago, and were now participating in Schenk’s ‘fini flight,’ an aviation tradition in which aircrew members are met by their unit comrades, family and friends and soaked with water after completing their final flight with their unit. (U.S. Air Force photo/ Airman 1st Class Clayton Cupit)

Lt. Col. Debi Rieflin, 315th Operations Group aircrew training chief, watches as a 927th Air Refueling Wing KC-135 Stratotanker prepares to fuel a C-17 Globemaster III July 1, 2014. C-17 Globemaster IIIs rely on aerial refueling to complete long-distance missions into and out of the theater of operations. Rieflin was a member of the initial cadre of C-17 pilot teams that flew C-17s to Charleston Air Base more than 20 years ago, and was also participating in Col. Tony Schenk’s ‘fini flight,’ an aviation tradition in which aircrew members are met by their unit comrades, family and friends and soaked with water after completing their final flight with their unit. (U.S. Air Force photo/ Airman 1st Class Clayton Cupit)

Col. Fred Boehm, 437th Operations Group commander (left), and Lt. Col. Debi Rieflin, 315th Operations Group aircrew training chief, perform an in-flight refueling exercise July 1, 2014. Boehm and Rieflin were both members of the initial cadre of C-17 pilot teams that flew C-17s to Charleston Air Base more than 20 years ago, and were also participating in Col. Tony Schenk’s ‘fini flight,’ an aviation tradition in which aircrew members are met by their unit comrades, family and friends and soaked with water after completing their final flight with their unit. (U.S. Air Force photo/ Airman 1st Class Clayton Cupit)

Col. Tony Schenk, 437th Operations Group deputy commander, is sprayed by friends and family July 1, 2014, on the flightline at Joint Base Charleston, South Carolina. Shenk just completed his ‘fini’ flight, an aviation tradition in which aircrew members are met by their unit comrades, family and friends and soaked with water after completing their final flight with that unit. (U.S. Air Force photo/ Airman 1st Class Clayton Cupit)