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.

David Childs, the lead architect of the One World Trade Center skyscraper that rose from the site where the Twin Towers collapsed ... for its Washington, D.C., office, where he worked on projects ...

David Childs, Architect of One World Trade Center That Rose on Twin Towers Site After 9/11 ... Owings & Merrill in 1971 for its Washington, D.C., office, where he worked on projects including ...