In order to build the towers, engineers needed to dig down 70 feet to reach bedrock. Until the construction of the Sears Tower, the towers were known as the tallest buildings in the world at 1,360 feet.
They were the hub of the bustling Financial District, a top tourist attraction and a symbol of America. The towers were built in 1973 and meant to symbolize globalization and America's economic power and prosperity.Īt 110 stories each, the buildings were used for businesses and accommodated 50,000 workers and 200,000 daily visitors. A third plane smashed into the Pentagon (the headquarters of the U.S.
10:28am - The North Tower fell not long after Two were crashed into the two towers of the World Trade Center in New York City.9:59am - The South Tower was the first to collapse after burning for around 56 minutes.10:03am - A fourth plane crashed in Pittsburgh, Pennsylvania as passengers fought with the hijackers on the flight.9:37am - Later, a third plane hit the Pentagon in Washington DC.9:03am - Just 18 minutes later, a second plane crashed into the South Tower.8:45am - The first American Airlines plane hit the North Tower of the World Trade Center.
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