One Royal Navy officer was killed and another was left seriously injured when a navy member opened fire aboard a British nuclear-powered submarine Friday. The body count would have been higher if not for Royston Smith, a local politician and former member of the Royal Air Force, who disarmed the gunman and wrestled him to the ground. “He had a magazine with 30 rounds in it so I took the view that someone had to stop him,” Smith told the BBC. The shooter was arrested on suspicion of murder Friday morning in Southampton, but officials stressed the shooting was not terrorism-related.