Staff Sgt. Miles Warwick, 10th Flight Test Squadron aircrew flight equipment technician, uses a communications equipment tester to inspect an oxygen mask's microphone headset July 25, 2018, at Tinker Air Force Base, Okla. Warwick has been with the 10th FLTS for about two years and is responsible for performing inspections, maintenance and adjustments of assigned flight equipment for B-1, B-52, E-3 and KC-135 aircrew. (U.S. Air Force photo by Jamal D. Sutter)