Army Chief, Ashfaque Pervaiz Kayani has left on a one-week official tour of the USA here today. ISPR said that the Chief of Army Staff, General Ashfaque Pervaiz Kayani has left for his first visit to USA, where he would be meeting US officials besides Secretary of Defence and other dignitaries. Lahore Corp Commander, General Ijaz Ahmad Bukhshi saw him off at the airport.