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World Trade Center (1973–2001) - Wikipedia
World Trade Center | History, Height, Memorial, & Facts
September 11 attacks: What happened on 9/11? - BBC News
The History of the Twin Towers Design and Architecture - Bloomberg
Collapse of the World Trade Center - Wikipedia
9/11 MEMORIAL AND MUSEUM - World Trade Center site
The World Trade Center — Facts and Figures - New York State …
One World Trade Center | History, Height, Construction, Map,
Homepage | National September 11 Memorial & Museum
New York's twin towers – the 'filing cabinets' that became icons …