This undated photo provided by the U.S. Army shows Spc. Shannon Chihuahua. Army Spc. Shannon “Doc” Chihuahua scrambled from soldier to soldier as enemy fighters in eastern Afghanistan sent volleys of bullets and rocket propelled grenades in the direction of his battalion on Nov. 12, 2010. As Chihuahua reached his last wounded soldier, a rocket propelled grenade struck the 25-year-old combat medic, killing him instantly. For those actions, the U.S. Army on Friday, Feb. 7, 2014 awarded Chihuahua a Silver Star, the third highest military award for valor, during a ceremony with his family and fellow soldiers at Fort Campbell, Ky. (AP Photo/U.S. Army)