One World Trade Centre(01 of11)
Open Image ModalIn this photo taken Thursday, Sept. 5, 2013 with a fisheye lens, One World Trade Center, center, overlooks the wedge-shaped pavilion entrance of the National September 11 Museum, lower right, and the square outlines of the memorial waterfalls in New York. Construction is racing ahead inside the museum as the 12th anniversary of the Sept. 11, 2001 attacks draws near. Several more large artifacts have been installed in the cavernous space below the World Trade Center memorial plaza. (AP Photo/Mark Lennihan) (credit:AP)
One World Trade Centre(02 of11)
Open Image ModalIn this Sept. 4, 2013 photo, One World Trade Center rises above the lower Manhattan skyline in New York. Twelve years after terrorists destroyed the old World Trade Center, the new World Trade Center is becoming a reality, with a museum commemorating the attacks and two office towers where thousands of people will work set to open within the next year. (AP Photo/Mark Lennihan) (credit:AP)
One World Trade Centre(03 of11)
Open Image ModalIn this Sept. 4, 2013 photo, One World Trade Center rises above the lower Manhattan skyline in New York. Twelve years after terrorists destroyed the old World Trade Center, the new World Trade Center is becoming a reality, with a museum commemorating the attacks and two office towers where thousands of people will work set to open within the next year. (AP Photo/Mark Lennihan) (credit:AP)
One World Trade Centre(04 of11)
Open Image ModalIn this Sept. 4, 2013 photo, One World Trade Center rises above the lower Manhattan skyline in New York. Twelve years after terrorists destroyed the old World Trade Center, the new World Trade Center is becoming a reality, with a museum commemorating the attacks and two office towers where thousands of people will work set to open within the next year. (AP Photo/Mark Lennihan) (credit:AP)
One World Trade Centre(05 of11)
Open Image ModalIn this June 21, 2012 photo, the sun reflects off 4 World Trade Center as a woman looks into the one of the reflecting pools at the 9/11 Memorial in New York. Developers expect the 72-story, 977-foot building at the southeast corner of the site to open in November 2013. Its main tenant will be the Port Authority, the bi-state agency that owns the trade center site and that lost its home when the twin towers fell. (AP Photo/Kathy Willens) (credit:AP)
One World Trade Centre(06 of11)
Open Image ModalIn this Thursday, Sept. 5, 2013, file photo taken with a fisheye lens, One World Trade Center, center, overlooks the wedge-shaped pavilion entrance of the National September 11 Museum, lower right, and the square outlines of the memorial waterfalls in New York. Formerly known as the Freedom Tower, the 104-story, 1,776-foot tall, One World Trade Center is scheduled to be completed in early 2014. (AP Photo/Mark Lennihan, File) (credit:AP)
One World Trade Centre(07 of11)
Open Image ModalIn this image made with a fisheye lens, One World Trade Center, center, rises above waterfalls at the National September 11 Memorial and Museum, Sunday, Sept. 8, 2013, in New York. Twelve years after terrorists destroyed the old World Trade Center, the new World Trade Center is becoming a reality, with a museum commemorating the attacks and two office towers where thousands of people will work set to open within the next year. (AP Photo/Mark Lennihan) (credit:AP)
One World Trade Centre(08 of11)
Open Image ModalIn this Sept. 4, 2013 photo, One World Trade Center rises above the lower Manhattan skyline in New York. Twelve years after terrorists destroyed the old World Trade Center, the new World Trade Center is becoming a reality, with a museum commemorating the attacks and two office towers where thousands of people will work set to open within the next year. (AP Photo/Mark Lennihan) (credit:AP)
One World Trade Centre(09 of11)
Open Image ModalClouds float above One World Trade Center, left, and Seven World Trade Center, Friday, Sept. 27, 2013 in New York. One World Trade Center, still under construction, is scheduled to open in 2014. (AP Photo/Mark Lennihan) (credit:AP)
One World Trade Centre(10 of11)
Open Image ModalOne World Trade Center, center, is lit up at dawn as the sunrise lights up the Lower Manhattan area in New York, seen from Jersey City, N.J. on Tuesday, Oct. 15, 2013. (AP Photo/Julio Cortez) (credit:AP)
One World Trade Centre(11 of11)
Open Image ModalOne World Trade Center, left, and Brookfield Place, right, are now linked by an newly opened underground concourse, Thursday, Oct. 24, 2013 in New York. The passageway, which had been closed since Sept. 11, 2001, is part of a nearly $4 billion redevelopment of the World Trade Center site that includes a new transportation hub scheduled to be completed in 2015. (AP Photo/Mark Lennihan) (credit:AP)