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The cornerstone was laid on July 4, 2004, but the building did not open until November 3, 2014. In 2004, architect David Childs, known for designing both the Burj Khalifa and the Willis Tower, took over. It was assumed such a plane would have to be lost in fog for such an event to occur a terrorist attack was never envisioned. Plans had already been made to guard against such an accident–which had happened in July 1945 with a smaller plane at the Empire State–and the towers were designed to be safe in a collision with a fully loaded 707 plane (the largest existing plane at the time). Wien even ran an ad in the New York Times in May 1968 predicting that a commercial airliner was likely to fly into the towers. In this way, the “skin” of the building would be strong enough that internal columns wouldn’t be necessary to hold it together.Ĭonstruction began in February 1967, after the Port Authority faced down criticism about the towers’ safety and viability from many powerful figures, including real estate tycoon (and Empire State Building owner) Lawrence Wien. Floor trusses connected this exterior steel lattice to the central steel core of the building. Instead of the traditional stacked glass-and-steel box construction of many New York skyscrapers, Yamasaki worked with structural engineers to come up with a revolutionary design: two hollow tubes, supported by closely spaced steel columns encased in aluminum. To fulfill the Port Authority’s requirement, architect Minoru Yamasaki designed two towers of 110 stories each. Market research indicated that the city would benefit more by modernizing its ports, however, and the plan was soon scrapped.īy this time, the Port Authority had decided that the trade center should replace the 1,250-foot-high Empire State Building, built in 1931, as the world’s tallest building. Aldrich, headed a new state agency with the proposed goal of creating a permanent trade exposition based in New York. The 1939 New York World’s Fair included an exhibit called the World Trade Center that was dedicated to the concept of “world peace through trade.” Seven years later, one of the exhibit’s organizers, Winthrop W. The disaster also radically altered the skyline of New York City, destroying the twin columns of glass and steel that over the years had come to embody the city itself.
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On September 11, 2001, the World Trade Center became the target of a massive terrorist attack that took the lives of nearly 3,000 people. They were the hub of the bustling Financial District, a top tourist attraction and a symbol of New York City’s–and America’s–steadfast devotion to progress and the future. Completed in 1973, the towers stood at 110 stories each, accommodating 50,000 workers and 200,000 daily visitors in 10 million square feet of space. The iconic twin towers of downtown Manhattan’s World Trade Center were a triumph of human imagination and will. The World Trade Center on September 11th.Feats of Engineering at the World Trade Center.