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Massive 'spine' skylight in Calatrava's WTC Oculus nears completion
Image via 'WTC Progress' Facebook page. Image via 'WTC Progress' Facebook page. Image via 'WTC Progress' Facebook page. Image via 'WTC Progress' Facebook page. Image via 'WTC Progress' Facebook page. Image via 'WTC Progress' Facebook page. Image via 'WTC Progress' Facebook page.

Image via 'WTC Progress' Facebook page.
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Image via "WTC Progress" Facebook page.