U.S. Air Force Staff Sgt. Jeremy West, 1st Maintenance Squadron aerospace ground equipment craftsman, conducts preventive maintenance and preparation work on a B809D Generator at Langley Air Force Base, Virginia, Sept. 9, 2015. The AGE technicians are responsible for maintaining equipment that supplies electricity and hydraulic and air pressure to aircraft. (U.S. Air Force photo by Senior Airman Kayla Newman)