AIR FORCE ADDRESS Defense Secretary Robert M. Gates addresses the audience at the Air Force Association's Air and Space Conference and Technology Exposition in Washington, D.C., Sept. 16, 2009. The three-day conference features more than 130 exhibitors and more than three dozen speakers discussing today's Air Force and aerospace development. SHARE IMAGE: Download Image: Full Size (0.06 MB) Photo By: VIRIN: 647681-P-OZF47-000.jpg Photo Gallery