The official party and audience sing "God Bless America" at the Pentagon Memorial Dedication Ceremony, Sept. 11, 2008. The national memorial is the first to be dedicated to those killed at the Pentagon on Sept. 11, 2001. The site contains 184 inscrib...

A military bugler plays as first responders salute atop the Pentagon during the Pentagon Memorial Dedication Ceremony, Sept. 11, 2008, at the spot where American Airlines Flight 77 crashed into the building on Sept. 11, 2001, killing 59 people aboard...

Members of a joint service honor guard carry a wreath toward the Pentagon Memorial Sept. 11, 2008, during its dedication ceremony. The memorial consists of 184 inscribed memorial units honoring the 59 people aboard American Airlines Flight 77 and the...

The official party watches as the first inscribed memorial unit is unveiled at the Pentagon Memorial, Sept. 11, 2008. The national memorial is the first to be dedicated to those killed at the Pentagon on Sept. 11, 2001. The site contains 184 inscribe...

Army Pfc. Mohamed Mustafa, Virginia Army National Guard soldier and George Mason University Reserve Officers Training Corps cadet, participates in an American flag dedication at the Pentagon in Washington, D.C., Sept. 10, 2008. The dedication was hea...

The sun rises over the main stage before the start of the Pentagon Memorial dedication ceremony Sept. 11, 2008. The national memorial is the first to be dedicated to those killed at the Pentagon on Sept. 11, 2001. The site contains 184 inscribed memo...

Donald Rumsfeld, former defense secretary, Defense Secretary Robert M. Gates, President George W. Bush and Chairman of the Joint Chiefs of Staff U.S. Navy Adm. Mike Mullen stand as the national anthem plays at the Pentagon Memorial Dedication Ceremon...