Army Sgt. 1st Class Peter George Lentz unveils the first bench at the Pentagon 9/11 Memorial as Defense Secretary Robert Gates; President George W. Bush; Donald Rumsfeld, former defense secretary; Navy Adm. Michael Mullen, the chairman of the Joint Chiefs of Staff; and James F. Laychak, chair of the Pentagon Memorial Fund, look on, Sept. 11, 2008. The site contains 184 inscribed memorial units honoring the 59 people aboard American Airlines Flight 77 and the 125 in the building who lost their lives that day. DoD photo by Cherie Cullen