Full title: Breathtaking video shows installation of final section of the World Trade Center spire as it's fastened to America's tallest building A camera attached to the bottom of One World Trade Center's highest component has provided dizzying footage from the top of New York City's tallest building.The final section of the spire, adorned with an American flag, was lifted by crane to the top of the skyscraper on Friday.A GoPro camera mounted near its base documented the careful rise of the iron piece, as dozens of construction workers watched in awe. (edit)