The airmen of “Delta Flight” from the 13th Air Support Operations Squadron, Fort Carson, Colo., pose for a group photo after reaching the capitol building in Washington, Aug 8, 2013. The “DG” 140 is a 140-mile memorial ruck march from the Casualty Reception Center at Dover Air Force Base to Maj. David 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)