What knocked down the twin towers?

Answer 1

this is an answer from the site http://www.serendipity.li/wtc2.htm. On that date [September 11, 2001], as is well known, 19 terrorists associated with an organization called al Qaeda hijacked four [Boeing 757 and 767] airplanes, and succeeded in crashing three of them into public buildings they had targeted - one into each of the two towers of the World Trade Center in New York, and one into the Pentagon near Washington, D.C. The World Trade Center towers were destroyed and the Pentagon was seriously damaged. Passengers on the fourth airplane sought to overpower the hijackers, and in so doing prevented that airplane from being similarly used, although it too crashed, in a field in Pennsylvania, and all aboard were killed. In all, more than 3,000 people were killed in that day's coordinated attacks.

add: good job for not plagiarizing and giving credit

Answer 2

NEW ANSWER

The WTC collapsed because 2 Hijacked Plane Deliberately flew into them.

1 Plane for The WTC 1 and WTC 2.

The WTC 7 Collapsed because of the flames shooting out of Tower 1/North Tower.

WTC 7 DID NOT get hit by a plane,

1 plane struck the pentagon in Washington DC The capital of America and 1 flew into a field because passengers took over the flight.

The South Tower of the WTC collapsed At 5:59, 57 Min's after it got struck by American Airlines.

Answer 3

The Twin Towers of the New York City "World Trade Center" collapsed as a result of collisions by hijacked aircraft on September 11, 2001.

American Airlines flight 11, a Boeing 767 enroute from Boston to Los Angeles, was hijacked and flown into the North Tower at 8:46 AM EDT. United Airlines flight 175, also flying from Boston to Los Angeles, was crashed into the South Tower at 9:03 AM. The South Tower collapsed first, at 9:59 AM, followed by the North Tower 29 minutes later at 10:28 AM.

Both buildings collapsed due to unanticipated structural flaws after burning jet fuel weakened their support beams. The weight of the upper floors could not be supported as they fell onto lower floors, and the buildings crumbled to near ground level. As many as 3000 people in and around the buildings were killed, along with the passengers of the two aircraft. The largest cause of fatalities was the destruction of the stairways that led from the upper floors. Hundreds of firemen responding to the emergency also perished.

Answer 4

It was a terrorist attack; the planes were deliberately flown into the buildings.

Answer 5

nobody knows for sure but people say it was the elevator shafts :(

Answer 6

because terrorists flew planes into them.

Answer 7

1. Who Destoryed The Twin Towers

Answer 8

Adolf Hitler