MANSEHRA, Aug 16: Terrorists ambushed four buses, pulled out the passengers and shot at least 19 of them dead in the Babusar Top area of Mansehra district on Thursday. Before killing the passengers, the assailants had checked their identity cards and shot them because they were Shia. “More than 50 terrorists wearing commando uniform intercepted a convoy going from Rawalpindi to Gilgit-Baltistan before 7am, hauled off passengers from four vans, identified them through their national…