"Ultra-clear", low-iron glass for the 185-foot concrete base is being supplied by PPG Industries and manufactured in its Carlisle, Pennsylvania plant. The curtain wall for the higher floors is being manufactured and assembled in Portland, Oregon by Benson Industries using glass made in Minnesota by Viracon.
World Trade Center July 2008
World Trade Center July 2008
Photo Derek7272World Trade Center Related Information
World Trade Center Progress Benchmark Projects Future Projects
World Trade Center Additional Photos
World Trade Center Photos GalleryWorld Trade Center Photos GalleryGround Zero Pictures from September 2005
Suggested Reading
September 11th, 2001 -- The Terrorist Attacks of September 11World Trade Center Observatory at NightThe Sphere in the Plaza
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