FILE - In this April 7, 2010 file photo, workers prepare a floor before pouring concrete at One World Trade Center in New York. (AP Photo/Mark Lennihan, File)

Associated Press
FILE - In this April 7, 2010 file photo, workers prepare a floor before pouring concrete at One World Trade Center in New York. (AP Photo/Mark Lennihan, File)
FILE - In this April 7, 2010 file photo, workers prepare a floor before pouring concrete at One World Trade Center in New York. (AP Photo/Mark Lennihan, File)
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