The Tribute in Light rises above the lower Manhattan skyline and Four World Trade Center, center, and One World Trade Center, left, in a test of the memorial light display, Monday, Sept. 9, 2013 in New York. The twin beams of light will also appear Wednesday, Sept. 11, twelve years after the terrorist attacks of Sept. 11, 2001. (AP Photo/Mark Lennihan)

Associated Press
The Tribute in Light rises above the lower Manhattan skyline and Four World Trade Center, center, and One World Trade Center, left, in a test of the memorial light display, Monday, Sept. 9, 2013 in New York. The twin beams of light will also appear Wednesday, Sept. 11, twelve years after the terrorist attacks of Sept. 11, 2001. (AP Photo/Mark Lennihan)
The Tribute in Light rises above the lower Manhattan skyline and Four World Trade Center, center, and One World Trade Center, left, in a test of the memorial light display, Monday, Sept. 9, 2013 in New York. The twin beams of light will also appear Wednesday, Sept. 11, twelve years after the terrorist attacks of Sept. 11, 2001. (AP Photo/Mark Lennihan)
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