Master Sgt. Timothy Sewell, 6th Operations Group C-37A flight engineer senior flight examiner, turns on the auxiliary power unit for aircraft power at MacDill Air Force Base, Florida, June 19, 2014. Sewell has accumulated 5,326 flight hours in his 19 years of service to the Air Force. (U.S. Air Force photo/Airman 1st Class Tori Schultz)