Change to top of WTC raises questions over height

One World Trade Center towers above the Lower Manhattan skyline and Hudson River, Monday, March 26, 2012, in New York. The tower, now up to 93 floors, will reach 104 floors and is scheduled for completion in 2013. (AP Photo/ Mark Lennihan)

May 10, 2012 12:32:41 PM PDT
A change to the design of a needle that will sit atop One World Trade Center is raising questions over whether the building will be America's tallest when completed.