Chief of Air Staff (CAS), Air Chief Marshal, Rao Qamar Suleman on Saturday visited General Headquarters and called on the Chief of Army Staff (COAS) General Ashfaq Pervez Kayani. The COAS congratulated Air Chief Marshal, Rao Qamar Suleman on promotion to the rank of Air Chief Marshal and appointment as Chief of Air Staff, COAS expressed the hope that Army and Air Force will continue to synchronize their professional roles to optimum Pakistan's defensive potential.