Cpl. Sean Breheny, rifle inspector with the Marine Corps Silent Drill Platoon, gets promoted to the rank of corporal during a ceremony at Marine Barracks Washington, D.C., June 4. - Cpl. Sean Breheny, rifle inspector with the Marine Corps Silent Drill Platoon, gets promoted to the rank of corporal during a ceremony at Marine Barracks Washington, D.C., June 4.