The hole-in-the-ground gang talks about the Spire

In this fascinating two-part video the architect, developer and members of the construction and engineering teams talk about the technical challenges of building the Chicago Spire and how they surmounted them.
http://en.wikipedia.org/wiki/Chicago_Spire

The financial and marketing challenges proved far more daunting than the design, environmental and engineering ones and the Spire, though buildable, remains unbuilt.

You can see more of our aerial photos of Chicago at Flickr.

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