The new 1,776-foot World Trade Center tower is the nation's tallest skyscraper.
The tower's height was measured to the top of the needle, which also serves as a broadcast antenna.
The designers of 1 World Trade Center had intended to enclose the mast's communications gear in decorative cladding made of fiberglass and steel. But the developer removed that exterior shell from the design, saying it would be impossible to properly maintain or repair.
The needle has a communications platform for radio and television equipment, and it is also topped with an LED beacon that will fire out a horizontal blaze of light visible from up to 50 miles away on a clear night — a feature that has been described as a crowning beacon of hope.1 World Trade Center stands as a monument to those killed in the terrorist attacks, the building measures 1,368 feet without the tower, a number that also holds symbolic weight as the height of the original World Trade Center.