Westminster attack: PC Keith Palmer stabbed to death despite body armour

The police officer killed in the Westminster terror attack died from a single stab wound to the chest, despite wearing protective body armour.An inquest into the deaths of the four victims of the attack has heard how PC Keith Palmer, 48, was killed by Khalid Masood outside Parliament last Wednesday.Scotland Yard has confirmed the father-of-two was wearing one of the stab vests routinely issued to Metropolitan Police officers, but it was not enough to save him and he died at the scene.