Secretary Gates delivers remarks at a memorial observance held at the Pentagon Memorial. Secretary of Defense Robert M. Gates delivers remarks at a memorial observance marking the 8th anniversary of the 2001 terrorist attack on the Pentagon held at the Pentagon Memorial on Sept. 11, 2009. Joining Gates for the commemoration are President Barack Obama (right) and Chairman of the Joint Chiefs of Staff Adm. Mike Mullen (2nd from left), U.S. Navy. SHARE IMAGE: Download Image: Full Size (0.08 MB) Photo By: VIRIN: 475046-U-QJK13-229.jpg Photo Gallery