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Experts are saying it is impossible that the towers were brought down by planes.
This evidence was:
- Fires do not usually reach temperatures hot enough to make a steel structure collapse.
- Most high-rise buildings have sprinkler systems that prevent a fire from getting to a critical level.
- Skyscrapers are protected using flame-proof materials so they do not collapse.
The video compares the destruction of the World Trade Center buildings (North and South Towers and Building 7) with controlled demolitions.