A police officer who intervened to stop a shooting spree at America's biggest military base was hailed today a heroine as she received treatment for the wounds received in a shoot-out with the gunman. Major Nidal Hasan, an army psychiatrist due to be posted to Afghanistan, shot dead 13 people and wounded 30 others after opening fire with two handguns at Fort Hood yesterday afternoon. But the death toll from the rampage could have been far worse had it not been for the actions of Sergeant Kimberly Munley, a civilian police officer stationed at the base who was the first...