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WORLD TRADE CENTER - UNITED STATES
Located in New York- USA, the World Trade Center , also known as the "Twin Towers,"
was built as a skyscraper. It is the building of commercial office tower, with steel frame,
glass, concrete slabs on steel truss joists. Begun in 1966 and completed in 1970, and demolished
by terrorist attack on September 11, 2001.
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