U.S. Air Force Capt. Christopher Williston, a 21st Airlift Squadron C-17 Globemaster III pilot from Baton Rouge, Louisiana, performs push-ups on an 18-pound medicine ball during a workout June 13, 2019, at Travis Air Force Base, California. Williston is training to compete in the Alpha Warrior Western Regional Competition June 21 at Hill AFB, Utah. (U.S. Air Force photo by Tech. Sgt. James Hodgman)
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