Former President Barack Obama, former First Lady Michelle Obama, President Joe Biden, First Lady Jill Biden and former New York City Mayor Michael...
Attendees of a ceremony in observance of the 15th anniversary of the 9/11 attacks sit on memorial benches at the Pentagon Memorial in Arlington,...
President Barack Obama greets attendees after an observance ceremony at the Pentagon Memorial on the 15th anniversary of the 9/11 terror attacks on...
President Barack Obama greets attendees after an observance ceremony at the Pentagon Memorial on the 15th anniversary of the 9/11 terror attacks on...
President Barack Obama greets attendees after an observance ceremony at the Pentagon Memorial on the 15th anniversary of the 9/11 terror attacks on...
President Barack Obama greets attendees after an observance ceremony at the Pentagon Memorial on the 15th anniversary of the 9/11 terror attacks on...
Attendees of a ceremony in observance of the 15th anniversary of the 9/11 attacks sit on memorial benches at the Pentagon Memorial in Arlington,...
President Barack Obama greets attendees after an observance ceremony at the Pentagon Memorial on the 15th anniversary of the 9/11 terror attacks on...
Joint Chiefs of Staff Gen. Joseph F. Dunford Jr. Speaks during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the Pentagon...
President Barack Obama greets attendees during a ceremony commemorating the September 11, 2001 attacks at the Pentagon in Washington, DC, on...
Secretary of Defense Ash Carter speaks during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the Pentagon Memorial...
President Barack Obama with Secretary of Defense Ash Carter and Chairman of the Joint Chiefs of Staff Gen. Joseph F. Dunford Jr. During a ceremony to...
President Barack Obama participates in a moment of silence during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the...
President Barack Obama participates in a moment of silence during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the...
President Barack Obama greets attendees during a ceremony commemorating the September 11, 2001 attacks at the Pentagon in Washington, DC, on...
President Barack Obama greets attendees during a ceremony commemorating the September 11, 2001 attacks at the Pentagon in Washington, DC, on...
President Barack Obama attends a ceremony commemorating the September 11, 2001 attacks at the Pentagon in Washington, DC, on September 11, 2016. /...
President Barack Obama attends a ceremony commemorating the September 11, 2001 attacks at the Pentagon in Washington, DC, on September 11, 2016. /...
President Barack Obama participates in a moment of silence during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the...
President Barack Obama participates in a moment of silence during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the...
President Barack Obama pauses during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the Pentagon Memorial September 11,...
President Barack Obama participates in a moment of silence during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the...
President Barack Obama participates in a moment of silence during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the...
President Barack Obama greets attendees during a ceremony commemorating the September 11, 2001 attacks at the Pentagon in Washington, DC, on...
President Barack Obama ducks under a tree to greet people after a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the...
President Barack Obama greets people after a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the Pentagon Memorial September...
President Barack Obama ducks under a tree to greet people after a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the...
President Barack Obama participates in a moment of silence during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the...
President Barack Obama participates in a moment of silence during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the...
President Barack Obama speaks during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the Pentagon Memorial September 11,...
President Barack Obama participates in a moment of silence during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the...
President Barack Obama , stands with Secretary of Defense Ashton Carter, during a ceremony to mark the 15th anniversary of the 9/11 terrorists...
President Barack Obama during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the Pentagon Memorial September 11, 2016 in...
President Barack Obama , speaks while flanked by Secretary of Defense Ashton Carter, during a ceremony to mark the 15th anniversary of the 9/11...
President Barack Obama pauses during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the Pentagon Memorial September 11,...
President Barack Obama lays a wreath during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the Pentagon Memorial September...
President Barack Obama lays a wreath during a ceremony to mark the 15th anniversary of the 9/11 terrorists attacks at the Pentagon Memorial September...
President Barack Obama attends a ceremony commemorating the September 11, 2001 attacks at the Pentagon in Washington, DC, on September 11, 2016. /...
President Barack Obama , Defense Secretary Ashton Carter and Joint Chiefs of Staff Gen. Joseph Dunford attend a ceremony commemorating the September...
President Barack Obama attends a ceremony commemorating the September 11 attacks at the Pentagon in Washington, DC, on September 11, 2016. / AFP /...
President Barack Obama attends a ceremony commemorating the September 11 attacks at the Pentagon in Washington, DC, on September 11, 2016. / AFP /...
In this U.S. Navy handout, sunrise at the Pentagon prior to a ceremony to commemorate the 15th anniversary of the Sept. 11, 2001 terror attacks. The...
In this U.S. Navy handout, sunrise at the Pentagon prior to a ceremony to commemorate the 15th anniversary of the Sept. 11, 2001 terror attacks. The...
People visit the Pentagon's 9/11 Memorial Park, on September 11, 2016 in Arlington, Virginia. President Obama is scheduled to visit the Pentagon and...
An American flag is draped over the Pentagon where it was hit by an airliner 15 years ago, September 11, 2016 in Arlington, Virginia. Later in the...
People visit the Pentagon's 911 Memorial Park, on September 11, 2016 in Arlington, Virginia. President Obama is scheduled to visit the Pentagon and...
Two young girls visit the Pentagon's 911 Memorial Park, on September 11, 2016 in Arlington, Virginia. President Obama is scheduled to visit the...
General view of the capital on the 15th anniversary on the 9/11 attacks on September 11, 2016 in Washington, DC. Later today U.S. President Barack...
General view of the capital on the 15th anniversary on the 9/11 attacks on September 11, 2016 in Washington, DC. Later today U.S. President Barack...
President Barack Obama attends a private ceremony on the 11th anniversary of the 9/11 attacks at the Pentagon in Arlington, Virginia, on Tuesday,...
President Barack Obama attends a private ceremony on the 11th anniversary of the 9/11 attacks at the Pentagon in Arlington, Virginia, on Tuesday,...
President Barack Obama attends a private ceremony on the 11th anniversary of the 9/11 attacks at the Pentagon in Arlington, Virginia, on Tuesday,...
Secretary of Defense Leon Panetta speaks at a private ceremony on the 11th anniversary of the 9/11 attacks at the Pentagon in Arlington, Virginia, on...
President Barack Obama greet family members and survivors following a private ceremony on the 11th anniversary of the 9/11 attacks at the Pentagon in...
First Lady Michelle Obama attends a private ceremony on the 11th anniversary of the 9/11 attacks at the Pentagon in Arlington, Virginia, on Tuesday,...
President Barack Obama lingered to chat with family members and survivors and sign invitations following a attend a private ceremony on the 11th...
Pentagon survivors Linda P. Irving, left, and Aline V. Tyler, of Tacoma Park, Maryland, attend a private ceremony on the 11th anniversary of the 9/11...
President Barack Obama attends a private ceremony on the 11th anniversary of the 9/11 attacks at the Pentagon in Arlington, Virginia, on Tuesday,...
President Barack Obama and First Lady Michelle Obama, accompanied by Secretary of Defense Leon Panetta , Mrs. Deanie Dempsey and Chairman of Joint...
First Lady Michelle Obama attends a private ceremony on the 11th anniversary of the 9/11 attacks at the Pentagon in Arlington, Virginia, on Tuesday,...