Lance Cpl. Zachery Sturges catches his rifle during the Challenge Day tryout for the U.S. Marine Corps Silent Drill Platoon at Marine Corps Air Stations Yuma, Ariz., Feb. 15. Sturges was named 'Old Dog' for top second year marcher in the platoon. - Lance Cpl. Zachery Sturges catches his rifle during the Challenge Day tryout for the U.S. Marine Corps Silent Drill Platoon at Marine Corps Air Stations Yuma, Ariz., Feb. 15. Sturges was named 'Old Dog' for top second year marcher in the platoon.