U.S. Congress members attend a September 11th remembrance ceremony on the steps of the U.S. Capitol in Washington D.C., capital of the United States, Sept. 11, 2013. (Xinhua/Zhang Jun) 
A security personnel works at a September 11th remembrance ceremony in Washington D.C., capital of the United States, Sept. 11, 2013. (Xinhua/Zhang Jun) 
U.S. Congress members attend a September 11th remembrance ceremony on the steps of the U.S. Capitol in Washington D.C., capital of the United States, Sept. 11, 2013. (Xinhua/Zhang Jun) 
U.S. Congress members attend a September 11th remembrance ceremony on the steps of the U.S. Capitol in Washington D.C., capital of the United States, Sept. 11, 2013. (Xinhua/Zhang Jun) 
In this photo released by U.S. Department of Defense (DOD), U.S. President Barack Obama (L), Defense Secretary Chuck Hagel (C) and Chairman of the Joint Chiefs of Staff Martin Dempsey attend a September 11th remembrance ceremony at the Pentagon in Washington D.C., capital of the United States, Sept. 11, 2013. (Xinhua/DOD Photo/Aaron Hostutler) 
In this photo released by U.S. Department of Defense (DOD), U.S. President Barack Obama (L), Defense Secretary Chuck Hagel (C) and Chairman of the Joint Chiefs of Staff Martin Dempsey attend a September 11th remembrance ceremony at the Pentagon in Washington D.C., capital of the United States, Sept. 11, 2013. (Xinhua/DOD Photo/Aaron Hostutler) 
In this photo released by U.S. Department of Defense (DOD), a family member of a victim of the 9/11 terrorist attack on the Pentagon cries during a September 11th remembrance ceremony at the Pentagon in Washington D.C., capital of the United States, Sept. 11, 2013. (Xinhua/DOD Photo/Erin A. Kirk-Cuomo) 
Workers are seen at the World Trade Center in New York City, the United States, Sept. 11, 2013, the twelfth anniversary of the terrorist attacks. (Xinhua/Wang Lei) 
New York Governor Andrew Cuomo addresses to commemorate the victims of the 9/11 terrorist attacks at the World Trade Center in New York City, the United States, Sept. 11, 2013, the twelfth anniversary of the terrorist attacks. (Xinhua/Wang Lei) 
Firemen commemorate the victims of the 9/11 terrorist attacks at the World Trade Center in New York City, the United States, Sept. 11, 2013, the twelfth anniversary of the terrorist attacks. (Xinhua/Wang Lei) 
People walk near the World Trade Center in New York City, the United States, Sept. 11, 2013, the twelfth anniversary of the terrorist attacks. (Xinhua/Wang Lei) 
Policemen commemorate the victims of the 9/11 terrorist attacks at the World Trade Center in New York City, the United States, Sept. 11, 2013, the twelfth anniversary of the terrorist attacks. (Xinhua/Wang Lei) 
A relative commemorate the victims of the 9/11 terrorist attacks at the World Trade Center in New York City, the United States, Sept. 11, 2013, the twelfth anniversary of the terrorist attacks. (Xinhua/Wang Lei) 
Tourists commemorate the victims of the 9/11 terrorist attacks at the World Trade Center in New York City, the United States, Sept. 11, 2013, the twelfth anniversary of the terrorist attacks. (Xinhua/Wang Lei) 
A man from Bronx borough commemorate the victims of the 9/11 terrorist attacks at the World Trade Center in New York City, the United States, Sept. 11, 2013, the twelfth anniversary of the terrorist attacks. (Xinhua/Wang Lei) |
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