Sgt. Patricio Parra, warehouse noncommissioned officer in charge, Headquarters Battalion, Marine Corps Air Ground Combat Center, comes from a foreign military family and is taking a new step in his eight-year Marine Corps career to become a drill instructor.(Official Marine Corps photo by Cpl. Connor Hancock/Released) - Sgt. Patricio Parra, warehouse noncommissioned officer in charge, Headquarters Battalion, Marine Corps Air Ground Combat Center, comes from a foreign military family and is taking a new step in his eight-year Marine Corps career to become a drill instructor.(Official Marine Corps photo by Cpl. Connor Hancock/Released)