Cranes Install Base of WTC Spire


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A part of the spire that will top off One World Trade Center was installed Tuesday morning.

Workers using two giant cranes on the 104th floor roof installed the first piece of the spire that will make it the tallest building in the Western Hemisphere.

The piece was brought to the building last month. Dozens of ironworkers were on hand Tuesday as the massive, round piece of iron slowly descended into its socket.