Ruck march honors 9/11 responders
Staff Sgt. Wayne Walker, left, 419th Civil Engineer squadron, and an unidentified Airman participate in a 9.11-mile ruck march Sept. 11, 2017, at Hill Air Force Base, Utah. In commemoration of 9-11, Participants completed physically demanding exercises at each station with a combined total of 403 repetitions, which represented the total number of first responders who gave their lives on 9/11. (U.S. Air Force photo by Todd Cromar)

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Photo by: Todd Cromar |  VIRIN: 170911-F-LS255-0493.JPG