How did the twin towers fall?

The Twin Towers of the World Trade Center (WTC) collapsed on September 11, 2001, as a result of being struck by two jet airliners hijacked by 10 terrorists affiliated with al-Qaeda, during the September 11 attacks. read more

The World Trade Center collapse on September 11, 2001 needs an explanation. 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. read more

If it had been free fall, with no restraint, the collapse would have only taken eight seconds and would have impacted at 300 km/h. 1 It has been suggested that it was fortunate that the WTC did not tip over onto other buildings surrounding the area. read more

The 9/11 World Trade Center collapse got people wondering how tall buildings fall. Explore what engineers and disbelievers think happened that day. The 9/11 World Trade Center collapse got people wondering how tall buildings fall. read more