"You're not going to leave me here to die?" Sgt. George Barlow asked his buddy, John Snyder. Barlow had just saved the lives of everyone in his squad by throwing himself on a live grenade the Japanese had hurled into their machine gun emplacement at Iwo Jima. Barlow's lower torso had been blown away, and Snyder knew his friend wouldn't survive until morning without help. Pinned down, could Snyder find a medic?