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Ground Zero
On September 11, 2001 at 9.59 AM, 2 World Trade Center, South Tower, collapsed after burning for about 56 minutes because the tower”s steel columns that were damaged by the plane crashing into the tower gave in to the heat from the fire.
At 10:28 AM, 1 World Trade Center collapsed for the same reason.
- Thermography
- Aerial photos
- Steel beams, bent
- Steel beams, snapped
- Steel beams, cut
- Cutting of steel elements
- Large steel elements and building material
Thermography
