NEW YORK (WXYZ) - Amazing time-lapse video of One World Trade Tower under construction at Ground Zero shows the progress.
It's being built where 6 World Trade Center once stood before the terrorist attack on 9-11.
When the building is completed it will stand 1,776 feet tall. It will have 104 floors and will be completed in 2013 or 2014. It will cost $4 Billion.
55 percent of the office space has already been leased out.
By next week the new tower is expected to rise above the Empire State Building as the tallest in New York
Watch the full video on ABCNews.com