U.S. Air Force Staff Sgt. Zacharias Clemmons, 18th Aircraft Maintenance Squadron crew chief, performs a hydraulics operations check on an F-15C Eagle March 27, 2020, at Kadena Air Base, Japan. The hydraulics check is performed by running a series of tests, which simulate the same conditions likely to occur in-flight. Airmen are working around the clock ensuring aircraft are ready for flight training operations in order to promote a free and open Indo-Pacific. (U.S. Air Force photo by Senior Airman Rhett Isbell)