U.S. Air Force Staff Sgt. Benjamin Hardy, 18th Component Maintenance Squadron test, measurement and diagnostic equipment element supervisor, calibrates equipment used to align the guns of the F-15 Eagle May 10, 2016, at Kadena Air Base, Japan. The 18th CMS ensures the tools used by maintainers are calibrated so they can do their jobs and keep pilots safe. (U.S. Air Force photo by Senior Airman Omari Bernard)

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