Start engine, increase throttle
U.S. Air Force Staff Sgt. Brittney Rogerson, an aerospace propulsion craftsman with the 35th Maintenance Squadron, increases the thrust of an F10-GE-129 engine during a routine engine test at Misawa Air Base, Japan, Feb. 4, 2016. Propulsion Airmen monitor and control the engine test in a portable testing cab. During the test, the cab measures the engine’s parameters, speed, temperatures and vibrations. Rogerson hails from York, Pennsylvania. (U.S. Air Force photo by Senior Airman Deana Heitzman)