US President Barack Obama accompanied by Defense Secretary Ash Carter (C) and Chairman of the Joint Chiefs of Staff Gen. Joseph Dunford (R) observe moment of silence, during a ceremony in observance to mark the15th anniversary of the 9/11 terrorist attacks at the Pentagon Memorial in Washington DC September 11, 2016. / AFP / Jose Luis Magana
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- US military personnel fold a flag as they take part in a memorial ceremony in honour of the 15th anniversary of the September 11, 2001 attacks on New York and Washington DC, at the International Security Assistance Force (ISAF) headquarters in Kabul on September 11, 2016. The United States marks the 15th anniversary of the 9/11 attacks on Sunday with solemn services to commemorate the victims of the deadliest terror strikes on US soil, which changed the world forever. It was the first foreign attack on the US mainland in almost two centuries and sparked US-led invasions of Afghanistan (2001) and Iraq (2003, where war rages on more than a decade later. / AFP / WAKIL KOHSAR
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- US military personnel attend a memorial ceremony in honour of the 15th anniversary of the September 11, 2001 attacks on New York and Washington DC, at the International Security Assistance Force (ISAF) headquarters in Kabul on September 11, 2016. The United States marks the 15th anniversary of the 9/11 attacks on Sunday with solemn services to commemorate the victims of the deadliest terror strikes on US soil, which changed the world forever. It was the first foreign attack on the US mainland in almost two centuries and sparked US-led invasions of Afghanistan (2001) and Iraq (2003, where war rages on more than a decade later. / AFP / WAKIL KOHSAR
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- US military personnel lower the US flag at a memorial ceremony in honour of the 15th anniversary of the September 11, 2001 attacks on New York and Washington DC, at the International Security Assistance Force (ISAF) headquarters in Kabul on September 11, 2016. The United States marks the 15th anniversary of the 9/11 attacks on Sunday with solemn services to commemorate the victims of the deadliest terror strikes on US soil, which changed the world forever. It was the first foreign attack on the US mainland in almost two centuries and sparked US-led invasions of Afghanistan (2001) and Iraq (2003, where war rages on more than a decade later. / AFP / WAKIL KOHSAR
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- US President Barack Obama attends a ceremony commemorating the September 11, 2001, attacks at the Pentagon in Washington, DC, on September 11, 2016. / AFP / NICHOLAS KAMM
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- US President Barack Obama speaks during a ceremony commemorating the September 11, 2001 attacks, with Defense Secretary Ashton Carter (2nd R) and Joint Chiefs of Staff Gen. Joseph Dunford (R) at the Pentagon in Washington, DC, on September 11, 2016. / AFP / NICHOLAS KAMM
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- US President Barack Obama attends a ceremony commemorating the September 11, 2001 attacks at the Pentagon in Washington, DC, on September 11, 2016. / AFP / NICHOLAS KAMM
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- US President Barack Obama lays a wreath during a ceremony commemorating the September 11, 2001 attacks at the Pentagon in Washington, DC, on September 11, 2016. / AFP / NICHOLAS KAMM
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- US President Barack Obama observes a moment of silence after laying a wreath during a ceremony commemorating the September 11, 2001 attacks at the Pentagon in Washington, DC, on September 11, 2016. / AFP / NICHOLAS KAMM
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- US President Barack Obama accompanied by Defense Secretary Ash Carter (C) and Chairman of the Joint Chiefs of Staff Gen. Joseph Dunford (R) observe moment of silence, during a ceremony in observance to mark the15th anniversary of the 9/11 terrorist attacks at the Pentagon Memorial in Washington DC September 11, 2016. / AFP / Jose Luis Magana
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- ARCHIVO – En esta imagen de archivo del 11 de septiembre de 2015, una mujer sostiene una fotografía durante una ceremonia en memoria de los atentados del 11 de septiembre de 2001 contra el World Trade Center en Nueva York. (AP Foto/Bryan R. Smith, Archivo)
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- La candidata demócrata a la presidencia, Hillary Clinton, abajo a la derecha, y otras personas participan en la ceremonia del 15to aniversario de los atentados en el World Trade Center, en el National September 11 Memorial, el domingo 11 de septiembre de 2016, en Nueva York. (AP Foto/Andrew Harnik)
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- Familiares de víctimas sostienen fotos de sus seres queridos en el 15to aniversario de los atentados en el World Trade Center, en el National September 11 Memorial, el domingo 11 de septiembre de 2016, en Nueva York. (AP Foto/Mary Altaffer)
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- US President Barack Obama (L), Defense Secretary Ashton Carter (2nd R) and Joint Chiefs of Staff Gen. Joseph Dunford (R) attend a ceremony commemorating the September 11, 2001 attacks at the Pentagon in Washington, DC, on September 11, 2016. / AFP / NICHOLAS KAMM
