Tim Howard, Delaware State Police trooper, 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)
Dr. Daniel Coons, Korean War Veterans Association Chapter 3 president, speaks at the 16th Annual Security Forces Ruck March Feb. 21, 2015, at Dover Air Force Base, Del. The ruck march was held to commemorate the Korean War Battle of Chosin Reservoir, November to December 1950. (U.S. Air Force photo/Airman 1st Class William Johnson)
Staff Sgt. Cavan Reilly, 436th Security Forces Squadron Base Defense Operation Center controller, hands out ruck sacks to participants of the 16th Annual Security Forces Ruck March Feb. 21, 2015, at Dover Air Force Base, Del. The ruck march consisted of a 6.2 mile course and participants had to wear a 30-pound ruck sack. (U.S. Air Force photo/Airman 1st Class William Johnson)
Tech. Sgt. Kenneth Bancroft, right, 436th Security Force Squadron flight chief, attaches a flag to the ruck sack of Chief Master Sgt. Christopher Pollock, left, 436th Mission Support Group superintendent, prior to the beginning of the 16th Annual Security Forces Ruck March Feb. 21, 2015, at Dover Air Force Base, Del. The racers were outfitted with a 30-pound ruck sack and ran on a 6.2 mile course around the perimeter of Dover AFB. (U.S. Air Force photo/Airman 1st Class William Johnson)
Runners sprint off the starting line of the 16th Annual Security Forces Ruck March Feb. 21, 2015, at Dover Air Force Base, Del. The ruck march consisted of 54 teams with 192 runners who ran the 6.2 mile course while wearing a 30-pound ruck sack. (U.S. Air Force photo/Airman 1st Class William Johnson)
Senior Airman Angela Gaul, 436th Security Forces Squadron response force member, competes in the 16th Annual Security Forces Ruck March Feb. 21, 2015, at Dover Air Force Base, Del. Gaul ran 6.2 miles with a 30-pound ruck sack in memory of the Korean War Battle of Chosin Reservoir. (U.S. Air Force photo/Airman 1st Class William Johnson)
Senior Airman Casey Wheatley, 436th Security Force Squadron military working dog handler, and his K-9, Veto, compete in the 16th Annual Security Forces Ruck March Feb. 21, 2015, at Dover Air Force Base, Del. The course was 6.2 miles and runners were required to wear a 30-pound ruck sack for the entire event. (U.S. Air Force photo/Airman 1st Class William Johnson)
Lt. Col. Joel Briske, 436th Security Forces Squadron commander, presents Dr. Daniel Coons, Korean War Veterans Association Chapter 3 president, with a check at the end of the 16th Annual Security Forces Ruck March Feb. 21, 2015, at Dover Air Force Base, Del. The money was raised by the 192 runners who participated in the 6.2 mile ruck march. (U.S. Air Force photo/Airman 1st Class William Johnson)