How many floors are there in the Twin Towers?

Each of the Twin Towers had 110 floors. Each tower's footprint and floors were approximately an acre in size. On windy days, each tower could sway up to almost 12 inches side to side. There were 43,600 windows in the Twin Towers, equating to more than 600,000 square feet of glass.



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What happened at the World Trade Center on 9/11? The hijacked Flight 11 was crashed into floors 93 to 99 of the North Tower (1 WTC) at 8:46 a.m. The hijacked Flight 175 struck floors 77 to 85 of the South Tower (2 WTC) 17 minutes later at 9:03 a.m.

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Many were on the scene when the towers collapsed. In total, 343 FDNY responders were killed that day.

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The final survivor, Port Authority secretary Genelle Guzman-McMillan, was rescued 27 hours after the collapse of the North Tower. Some firefighters and civilians who survived made cell phone calls from voids beneath the rubble, though the amount of debris made it difficult for rescue workers to get to them.

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On September 11, 2001, terrorists killed nearly 3,000 people and injured more than 6,000 others in the worst attack against the homeland in our nation's history.

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On Tuesday, September 11, 2001, terrorists linked to al-Qaeda hijacked four passenger planes. Two were flown into the World Trade Center, one into the Pentagon, and a fourth crashed in a field in Pennsylvania after passengers tried to overpower the hijackers. Its target may have been the Capitol or the White House.

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Four airliners were turned into weapons of mass destruction on 9/11; a fifth may have been targeted.

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Adding up the earnings and physical capital losses, Bram, Orr, and Rapaport estimate the total cost of the World Trade Center attack to be between $33 billion and $36 billion.

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The hijackers inside the cockpit are heard yelling No! over the sound of breaking glass. The final spoken words on the recorder were a calm voice in English instructing, Pull it up. The plane then crashed into an empty field in Stonycreek, Pennsylvania, about 20 minutes' flying time from Washington, D.C.

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Ultimately, 8 EMS providers and 343 firefighters died that day and countless more have succumbed to 9/11-related illnesses from their time working at Ground Zero.

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