Chief of the Army Staff (COAS) General Raheel Sharif has highly appreciated Aitzaz Hasan, Hangu student and dubbed him a national hero.According to a statement released by the ISPR on Saturday, General Raheel Sharif said that Aitzaz Hasan is a national hero, who has sacrificed his today for our tomorrow.The young student of Grade IX set a great example of bravery and valour with his act.Aitzaz Hasan embraced martyrdom while trying to stop a suicide bomber from entering a school in Hangu a few days ago.