Video of the twin towers being hit and falling

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Why the World Trade Center Towers Fell on 9/11

video of the twin towers being hit and falling

These are live-tv-recordings of the hit of the second plane and the collapsing of the two towers of the World trade center on 11 September

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On September 11, —a clear, sunny, late summer day—al-Qaida terrorists aboard three hijacked passenger planes carried out coordinated suicide attacks against the World Trade Center in New York City and the Pentagon in Washington, D. A fourth plane crashed into a field near Shanksville, Pennsylvania, killing all on board, after passengers and crew attempted to wrest control from the hijackers. The Boeing is headed to Los Angeles with 64 people aboard. It had been scheduled to depart at am, around the time of the other hijacked flights. Bush that a plane has hit the World Trade Center; the president is visiting an elementary school in Sarasota, Florida at the time. Capitol building are evacuated along with numerous other high-profile buildings, landmarks and public spaces.

New York City 's World Trade Center was destroyed during the terrorist attacks of September 11, after being struck by two hijacked commercial airliners. As a result of the attacks to the towers, a total of 2, people died including 2, civilians , firefighters , and 71 law enforcement officers as well as all the passengers and crew on the airplanes, including civilians and the 10 hijackers. The scale of the destruction initially puzzled engineers, who had expected the buildings to survive airplane impacts. In September , the National Institute of Standards and Technology published the results of its investigation into the collapse. The investigators did not find anything substandard in the design of the twin towers, noting that the severity of the attacks was beyond anything experienced in buildings in the past.

In the years since the terrorist attacks in New York City, individual engineers and committees of experts have studied the crumpling of the World Trade Center twin towers. By examining the building's destruction step-by-step, experts are learning how buildings fail and discovering ways to build stronger structures by answering the question: What caused the twin towers to fall? When hijacked commercial jets piloted by terrorists struck the twin towers, some 10, gallons 38 kiloliters of jet fuel-fed an enormous fireball. But the impact of the Boeing ER series aircraft and the burst of flames did not make the towers collapse right away. Like most buildings, the twin towers had a redundant design, which means that when one system fails, another carries the load. Each of the twin towers had columns around a central core that housed the elevators, stairwells, mechanical systems, and utilities.

It ended up not just predicting the manner of the collapse, but also its speed. The World Trade Center towers were once the tallest buildings in the world, marvels of engineering and architecture. The official report has left many questions unanswered and spawned countless conspiracy theories. But two scientists, working independently, have come up with the same new theory, based on missing evidence, which may finally explain what happened on that tragic morning. Stream hundreds of shows by starting your free trial to Smithsonian Channel Plus. Check the availability of this title and explore our vast library of original documentaries and series. Access even more free Smithsonian Channel full episodes and documentaries online through participating TV providers.

9/11 FOIA Videos: Street-Level Footage, Aerial Shots (Viewer Warning)

9/11: As Events Unfold


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