Senior Master Sgt. Danny Walker, 28th Logistics Readiness Squadron superintendent, and president of the Green Knights Dakota Thunder Motorcycle Club, leads the pack during the 2013 Dakota Thunder Run Aug. 6, 2013. During the run, cyclists were encouraged to ride in a staggered formation to ensure a safe and enjoyable trip through the Black Hills. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)
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