Prince Khalid bin Sultan, Assistant Minister of Defense and Aviation for military affairs, left here last night after patronizing a graduation ceremony of the Fifth Batch of King Abdullah Air Defense Academy. He was seen off at King Fahd Air Base by Fahd bin Abdulaziz bin Moammar Governor of Taif Governorate; General Abdulaziz Mohammed Al-Hussain, Commander of the Air Defense and a number of high-ranking officials.