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)