Keywords: US Navy 100911-D-7203C-008 President Obama at Pentagon Memorial.jpg en WASHINGTON Sept 11 2010 Chairman of the Joint Chiefs of Staff Adm Mike Mullen President Barack Obama and Defense Secretary Robert M Gates render honors during the playing of the national anthem at the Pentagon Memorial during a ceremony marking the ninth anniversary of the September 11 attacks Sept 11 2010 Defense Department photo by Cherie Cullen/Released 2010-09-11 100911-D-7203C-008 Navy http //www navy mil/view_image asp id 91487 U S Navy photo PD-USGov-Military-Navy 2010 in Virginia The Pentagon Michael G Mullen in 2010 20100911 Barack Obama in 2010 20100911 Robert Gates in 2010 20100911 Pentagon Memorial Hand over heart Ninth anniversary of the September 11 2001 attacks Salutes Photographs taken on 2010-09-11 Personality rights |