Islamabad: President Asif Ali Zardari has conferred the award of Nishan-i-Pakistan upon Crown Prince of Abu Dhabi Sheikh Khaled bin Mohammed bin Zayed Al Nahyan. The President gave the award at a special investiture ceremony in Islamabad today.According to Radio Pakistan, Prime Minister Shehbaz Sharif, federal ministers, parliamentarians as well as senior civil and military officials were also present on the occasion.