An airmen from “Delta Flight” pulls off his sock to let his feet dry out, during a 140-mile ruck march in honor of a fallen commander, Maj. David Gray, Aug. 8, 2013. “DG” 140 is a 140-mile memorial ruck march for Gray, beginning at the Casualty Reception Center at Dover Air Force Base to Gray’s headstone at Arlington National Cemetery, Aug. 4-8. Gray was killed in action outside of combat outpost Fiaz and was posthumously awarded the Bronze Star Medal and Purple Heart. (U.S. Air Force photo by Senior Airman Carlin Leslie)