U.S. Soldiers with Distribution Platoon, Delta Company, 6th Squadron, 8th Cavalry Regiment, 4th Infantry Brigade Combat Team, 3rd Infantry Division, receive instructions on how to prepare a simulated casualty for a battlefield extraction at Forward Operating Base Shank in Logar province, Afghanistan, March 13, 2013. (U.S. Army photo by 1st Lt. Matthew Mellor/Released)