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Infernos Caused WTC Towers to Fall

In one of the most detailed analyses made public since September 11, The New York Times has published a summary of a forthcoming report from FEMA and the American Society of Civil Engineers about the likely cause of the collapse of the World Trade Center.

The report says that both towers could probably have withstood the impact of the planes, if fires had not subsequently broken out. But, the extreme heat generated by these fires, estimated at three to five gigawatts was sufficient to melt the structural steel, the alumnium bodies of the planes and metal fixtures and office furniture in the impact area.

Detailed descriptions of the impacts on the South and North Towers are provided, but the article indicates that the analysis of the North Tower may not be sufficient to fully explain the chain of events the culminated in its collapse.

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