ISLAMABAD (APP) - Chief of Army Staff General Ashfaq Parvez Kayani left on an official visit to the United States on Saturday. He is visiting the US on the special invitation of the American Centcom cheif General David Petraeus. During the visit, Kayani would meet senior military and government officials at Tampa and Washington, while he will also participate in Pak-US Strategic Dialogue. Acting Corps Commander and other senior military officials saw off the COAS at the Lahore Airport.