555th Fighter Squadron
Staff Sgt. Richard Snyder, 31st Operations Support Squadron aircrew flight equipment assistant NCO in charge, conducts an equipment check on a pilot’s oxygen mask, Feb. 26, 2013, on Aviano Air Base, Italy. AFE specialists use various types of test equipment to monitor oxygen levels, leaks, radios and more, to ensure reliability of equipment. (U.S. Air Force photo/Senior Airman Jessica Hines)