One World Trade Center is scheduled to be completed in early 2014
The 72-story 4 World Trade Center will open in November 2013. The 9/11 Museum is on schedule to open spring 2014
2 WCBS NewYork
NEW YORK- Work continues to progress at the World Trade Center site as the nation prepares to mark the 12th anniversary of the deadliest terror attack on U.S. soil.
The 104-story building, which stands at the northwest corner of the 16-acre site.
Crews are almost done installing windows and steel beams. The main lobby will feature 50-foot-high ceilings.
The 64th floor will eventually be a sky lobby, providing 360-degree views of the city. An express elevator will go from that floor to the observation deck at the very top.
A couple of years from now, what is now a construction zone will be an open street corner with Greenwich Street running south and Fulton Street running west along the site.
Tenants will start moving in next year and the observation deck will be open to the public in 2015.
Two more office towers, a transportation hub and a performing arts center are also in the works.
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Video: Official One World Trade Center Time-Lapse 2004-2013
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Dilemma X 
September 11, 2013
Did you know?, Remember yesteryear