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The Ground Zero Fires
Were Not Conventional Fires

Here is a photograph showing the fires in the twin towers on 9/11:

The smoke rising from the towers is dark in color because it contains soot.

The smoke released by any type of fire (forest, brush, crop, structure, tires, or waste) is a mixture of particles and chemicals produced by incomplete burning of carbon-containing materials. All smoke contains particulate matter (PM or soot). Dark smoke implies the presence of soot. Soot is produced when a fire is oxygen starved, or has just been extinguished. Soot also has a high thermal capacity and may act to rob a fire of heat by carrying it away.

Here is a photograph showing Ground Zero following the collapses:

The fires at Ground Zero were oxygen starved, so the color of the smoke should be very dark. As you can see, this is not the case - the smoke is white. This video shot from a helicopter flying over the WTC wreckage on 15 September 2001 emphasizes the extent of the white smoke.

Also, the oxygen starved fires should have been relatively cool and easy to extinguish, but his was not the case:

Firefighters atop a number of ladder trucks were spraying in the areas of greatest smoke. The average temperature beneath the rubble is said to be 1500 F. so that when steel is brought up it is molten and takes two or three days to cool down. [nd.edu]

The Ground Zero fires were not conventional fires.

Probable cause: thermite.


See also:

Thermal Hot Spots: Fingerprint of a WTC Demolition
The 9/11 WTC Collapses: An Audio-Video Analysis


What Really Happened