Gen. Peter Pace salutes as the National Anthem is played. Chairman of the Joint Chiefs of Staff Gen. Peter Pace, U.S. Marine Corps, salutes as the National Anthem is played during groundbreaking ceremonies for the Pentagon Memorial on June 15, 2006. The Pentagon Memorial will commemorate the 184 people killed in the Pentagon and on American Airlines Flight 77 on September 11, 2001. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 492113-J-UTI41-135.jpg Photo Gallery