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Last beam lifted into place atop 4 World Trade Center

The last steel beam is lifted to the top of 4 World Trade Center, June 25.Andrew Gombert / EPA

The final steel beam, signed by a group of construction workers was lifted by crane 977 feet in the air and placed atop 4 World Trade Center, which will be the first tower completed on the 16-acre World Trade Center site when it opens in the fall of 2013.  Full story.