Researchers at Purdue University build a scientifically accurate 3D simulation of the World Trade Center tower when the airplane hit it.

Among their conclusions:

• The weight of 39,000 liters of fuel was a major factor in the collapse.
• The fire that ensued damaged the fireproofing and the steel columns weakened.
• The airplane disintegrated as it swept through the building.

Resources

• CBC: Scientists make computer simulation of 9/11 attack.
• Quicktime Movie of the simulation.