Tactical Air Control Party Airmen from the 13th Air Support Operations Squadron, Ft. Carson, Co. perform push-ups in honor of their fallen commander, Maj. David Gray, Aug. 7, 2013. Gray was killed in Afghanistan last year. The TACP’s are marching from Dover Air Force Base, Del., the receiving point for deceased service members killed in war, to Arlington National Cemetery, to Gray’s gravesite. The march will total 140 miles once they’ve completed their journey. (U.S. Air Force photo/Senior Airman Lauren Main)