A U.S. Air Force Tactical Air Control Party Airman assigned to the 10th Air Support Operations Squadron, Fort Riley, Kansas, performs pull-ups as part of a Tier II Operator Fitness Test during the 2019 Lightning Challenge at Joint Base Lewis-McChord, Wash., July 29, 2019. The 2019 Lightning Challenge marked the first time the week-long competition had been held since 2005. (U.S. Air Force photo by Staff Sgt. Zade Vadnais)
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