Private First Class Derik A. Arnold, 20-year-old infantryman with 1st Platoon, Golf Company, 2nd Battalion, 3rd Marine Regiment, sits with his wife, Katrina, with his arms around her Nov. 3 at the Combat Center. Arnold was on a night patrol Oct. 20 in Fallujah when two fragment grenades were thrown toward his squad. His alertness saved their lives when he hollered to run away. The York, Neb., native received a barrage of shrapnel into his backside and his life was saved by the flack jacket he was wearing. - Private First Class Derik A. Arnold, 20-year-old infantryman with 1st Platoon, Golf Company, 2nd Battalion, 3rd Marine Regiment, sits with his wife, Katrina, with his arms around her Nov. 3 at the Combat Center. Arnold was on a night patrol Oct. 20 in Fallujah when two fragment grenades were thrown toward his squad. His alertness saved their lives when he hollered to run away. The York, Neb., native received a barrage of shrapnel into his backside and his life was saved by the flack jacket he was wearing.