Columbia subject headings:
Harvard subject headings:
Architecture--Competitions--New York (State)--New York.
Architecture--New York (State)--New York--21st century--Designs and plans.
City planning--New York (State)--New York--History--21st century.
Commercial buildings--New York (State)--New York--Designs and plans.
Manhattan (New York, N.Y.)--Buildings, structures, etc.
New York (N.Y.)--Buildings, structures, etc.
September 11 Terrorist Attacks, 2001.
World Trade Center (New York, N.Y.)
World Trade Center Site (New York, N.Y.)
Princeton subject headings:
Architecture--New York (State)--New York--21st century--Designs and plans.
City planning--New York (State)--New York--History--21st century.
Manhattan (New York, N.Y.)--Buildings, structures, etc.
New York (N.Y.)--Buildings, structures, etc.
World Trade Center Site (New York, N.Y.)