He also was involved in such notable projects as a new master plan for the National Mall in Washington, D.C. and an expansion of Dulles International Airport in Virginia.

"Ground Zero Supertower" examines the new skyscraper, One World Trade Center, rising up 104 stories and 1,776 feet from the site where the Twin ... the 9/11 Memorial, NOVA goes inside the ...

The memorial's twin reflecting pools and human-made waterfalls rest as eerie footprints where the World Trade Center's twin towers once stood. The 1-acre pools are enclosed in bronze panels on ...