ROBINS AIR FROCE BASE, Ga. – Robert Childs, 402nd Aircraft Maintenance Support Group Aerospace Ground Equipment Flight power support mechanic, troubleshoots a fault light on a portable hydraulic purifier at Robins Air Force Base, Georgia, Aug. 19, 2021. The hydraulic purifier filters water and contaminates out of an aircraft hydraulic fluid to prevent them from entering the aircraft’s hydraulic system and fluid supply. (U.S. Air Force photo by Joseph Mather)