ภาพอเมริการ่วมรำลึกครบรอบ 14 ปีเหตุการณ์ 9/11

President Barack Obama, first lady Michelle Obama and others observe a moment of silence to mark the 14th anniversary of the 9/11 attacks, on the South Lawn of the White House in Washington, Sept. 11, 2015.

Low clouds surround the top of the One World Trade Center tower, center left, at sunrise during the 14th anniversary of the terrorist attacks, Sept. 11, 2015.

On the 14th anniversary of the attack, a U.S. flag is draped on the side of the Pentagon, Sept. 11, 2015, where the building was attacked on September 11th in 2001.

Army Sgt. Edwin Morales prays during a ceremony at the World Trade Center site in New York, Sept. 11, 2015.

Lanterns are carried during a candlelight memorial to the passengers and crew of United Flight 93, at the Flight 93 National Memorial in Shanksville, Pennsylvania, Sept. 10, 2015.

Defense Secretary Ash Carter bows his head during a moment of silence at the Pentagon Memorial, Sept. 11, 2015, during a service on the 14th anniversary of the terrorist attacks.

Chris Miller, right, and Terry Miller, center, look for their brother Robert Cromwell Miller's name on the "Empty Sky" memorial to New Jersey's victims of the 9/11 2001 terrorist attacks, as nephew James Miller, left, looks on early on Sept. 11, 2015, in

An unidentified man takes photos before sunrise at the National 9/11 Pentagon Memorial, Sept. 11, 2015, on the 14th anniversary of the 911 attacks.

NATO forces observe a moment of silence during a memorial ceremony on the 14th anniversary of the 9/11 terrorist attacks on the United States, at the headquarters of the International Security Assistance Force, in Kabul, Afghanistan, Sept. 11, 2015.