Two commercial airliners hijacked by terrorists were deliberately flown into the Twin Towers of the complex, resulting in a total progressive collapse that killed almost 3,000 people. It was the deadliest and costliest building collapse in history.

2019年9月11日 · On this day 18 years ago, unimaginable horror struck America when four commercial flights were hijacked by terrorists and crashed into sites including New York City’s Twin Towers. The morning of Tuesday, September 11 was fine and sunny, with New Yorkers navigating the manic rush-hour commute to work or school under a cloudless blue sky.

2016年9月11日 · American Airlines Flight 11 and United Airlines Flight 175 were each crashed into the north and south towers of the WTC, also known as the Twin Towers.

2021年9月10日 · For those who survived the initial impact of two passenger jets that slammed into the World Trade Centre on September 11, 2001, the nightmare was just beginning. The simplest of escape routes were the stairwells. To get out of twin towers, you had to take 2,071 steps to descend from the highest floor.

2025年1月9日 · Two planes hit the Twin Towers of the World Trade Center in New York, with the second strike 17 minutes after the first. The buildings were set on fire, trapping people on the upper floors,...

During the September 11 attacks, two jet airliners struck the Twin Towers of the World Trade Center (WTC), one to each tower. [5] As a result, the two 110 stories-tall skyscrapers collapsed, causing complete destruction to the entire WTC complex and killing 2,763 people.

2011年6月21日 · Civilians bolt in the opposite direction as firefighters rush towards the Twin Towers of the New York City's World Trade Center after a plane hit the building on September 11, 2001. Suicide...

2021年9月8日 · the twin towers burned so fast and hot because the amospheric Press was forcing vast quantities of air up the towers. the lower huge windows had been shattered by initial impact converting the towers into firetubes.

Read Jason Averill's story about investigating the WTC evacuation and Steve Kirkpatrick's work analyzing the aftermath of the Twin Towers aircraft impacts.

The Twin Towers ultimately collapsed because of the damage sustained from the impacts and the resulting fires. After learning about the other attacks, passengers on the fourth hijacked plane, Flight 93, fought back, and the plane was crashed into an empty field in western Pennsylvania about 20 minutes by air from Washington, D.C.