Tim Howard, Delaware State Police, runs down perimeter road with a 30-pound ruck sack during the 16th Annual Security Forces Ruck March Feb. 21, 2015, at Dover Air Force Base, Del. Temperatures reached as low as minus 1 degree Fahrenheit with the wind-chill during the 6.2 mile race. (U.S. Air Force photo/Airman 1st Class William Johnson)
Airman 1st Class William Johnson
Taken on 21 February 2015
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