Shortly after 8 a.m. on Sept. 16, 2013, a lone gunman opened fire at the Washington Navy Yard taking 12 lives. Not far away, Marine Staff Sgt. Zachary Rubart was training at Marine Barracks Washington as the platoon sergeant for the Marine Corps’ famed Silent Drill Platoon, reported Marine Corps Times. Hearing reports of an active shooter, Rubart immediately sprang into action, forming a quick-reaction force from the ranks of his Marines to neutralize the potential threat.