David Peters displays a jacket with a painting of the Twin Towers outside of the World Trade Center site on the eleventh anniversary of the terrorist attacks on September 11, 2012 in New York City.

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Flowers with a note to a loved one are placed on a railing overlooking lower Manhattan on the eleventh anniversary of the terrorist attacks on September 11, 2012 in the Brooklyn borough of New York City.

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People walk by the 1 World Trade outside of the World Trade Center site on the eleventh anniversary of the terrorist attacks September 11, 2012 in New York City.

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U.S. President Barack Obama (C), lays a wreath while flanked by his wife first lady Michelle Obama (L) Secretary of Defense Leon Panetta (2nd-L), and Chairman of the Joint Chiefs of Staff Gen. Martin Dempsey (R) during a 9/11 remembrance ceremony at the Pentagon, September 11, 2012 in Arlington, Virginia.

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John Cassidy pauses outside outside of the World Trade Center site on the eleventh anniversary of the terrorist attacks September 11, 2012 in New York City.

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A group of firefighters pause outside of the World Trade Center site on the eleventh anniversary of the terrorist attacks September 11, 2012 in New York City.

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U.S. President Barack Obama (R), and Secretary of Defense Leon Panetta (L), participate in a moment of silence during a 9/11 remembrance ceremony at the Pentagon, September 11, 2012 in Arlington, Virginia.

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aicia Rodriguez holds a American Flag during a moment of silence at the South Tower pool during observances for the eleventh anniversary of the terrorist attacks on lower Manhattan at the World Trade Center site September 11, 2012 in New York City.

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Melissa Pullis, of Hazlet, New Jersey, stands at the engraving for her husband Edward during memorial ceremonies for the eleventh anniversary of the terrorist attacks on lower Manhattan at the World Trade Center site September 11, 2012 in New York City.

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A woman walks with a picture of a loved one outside of the World Trade Center site on the eleventh anniversary of the terrorist attacks September 11, 2012 in New York City.

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Names of victms sit engraved during memorial ceremonies for the eleventh anniversary of the terrorist attacks on lower Manhattan at the World Trade Center site September 11, 2012 in New York City.

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The opening bell is rung on the floor of the New York Stock Exchange on the eleventh anniversary of the 9/11 terrorist attacks on September 11, 2012 in New York City.

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A family member sticks a flag in the name of Frances Ann Cilente, during memorial ceremonies for the eleventh anniversary of the terrorist attacks on lower Manhattan at the World Trade Center site September 11, 2012 in New York City.

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People stand during a moment of silence at 8:46 AM for the observance of time American Airline Flight 11 struck north World TradeTower during memorial ceremonies for the eleventh anniversary of the terrorist attacks on lower Manhattan at the World Trade Center site September 11, 2012 in New York City.

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Ava Kathleen Schmoelzer, 7, makes a rubbing of her aunt's Kathleen Moran name during memorial ceremonies for the eleventh anniversary of the terrorist attacks on lower Manhattan at the World Trade Center site September 11, 2012 in New York City.

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People pause outside of the World Trade Center site on the eleventh anniversary of the terrorist attacks September 11, 2012 in New York City.

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An honor guard carries the World Trade Center flag near the South Pool of the 9/11 Memorial during ceremonies for the eleventh anniversary of the terrorist attacks on lower Manhattan at the World Trade Center site September 11, 2012 in New York City.

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Linda Torrens holds a portrait of her cousin Janine Nicole Gonzalez before the start of the memorial ceremonies for the eleventh anniversary of the terrorist attacks on lower Manhattan at the World Trade Center site September 11, 2012 in New York City.

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Dennis Swindell kisses the name of his partner Gary Lee Bright inscribed on the South Tower memorial pool wall during observances for the eleventh anniversary of the terrorist attacks on lower Manhattan at the World Trade Center site September 11, 2012 in New York City.

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Port Authority Police Officers carry the American flag that flew over at the World Trade Center towers during memorial ceremonies for the eleventh anniversary of the terrorist attacks on lower Manhattan at the World Trade Center site September 11, 2012 in New York City.

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