Looking a bit like a rocket taking flight, the spire of 1 World Trade Center was hoisted aloft on Thursday and set on a temporary platform atop the nearly completed building. When it is bolted into place at a later date, the spire will bring the building to a height of 1,776 feet.
This post has been revised to reflect the following correction:
Correction: May 2, 2013
Because of an editing error, an earlier version of this post gave an erroneous distinction to 1 World Trade Center. It will be the tallest building in the Western Hemisphere, not the world. (The tallest building in the world is in the United Arab Emirates.)