President Asif Ali Zardari has expressed condolence on the martyrdom of four jawans of Pakistan Army in South Waziristan in an exchange of fire with Khawarij.In his message, he said the nation salutes its brave men who sacrificed their own lives for the sake of country.The President vowed to give every sacrifice to save the country from the menace of terrorism.He asserted that nation stands with its brave men as Jawans of Pakistan Army sent six Khawarij to hell by taking risk of their own lives.Asif Ali Zardari prayed for the high ranks of the martyrs and patience for their families.Source: Radio Pakistan