Spire Tops One World Trade Center

A crane lifted the last of a 408-foot tall spire on top of One World Trade Center on Friday, a capstone to an emotional 12-year effort to replace the twin towers destroyed by terrorists.

Tenants to use the new transmission tower have not be revealed.

The 18-piece silver spire will top out the tower at a symbolic 1,776 feet, a nod to the year America signed the Declaration of Independence. The new building is just north of the original towers, now the hallowed ground known as Ground Zero.