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U.S. Air Force Capt. Christopher Williston, a 21st Airlift Squadron C-17 Globemaster III pilot from Baton Rouge, Louisiana, looks at his fitness tracker to see how many calories he’s burned during a workout June 13 at Travis Air Force Base, California. Williston is training to compete in the Alpha Warrior Western Regional Competition June 21 at Hill AFB, Utah. During the workout, Williston burned 746 calories. (U.S. Air Force photo by Tech. Sgt. James Hodgman)
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