The Final Report on the Collapse of the World Trade Center Towers published by the National Institute of Standards and Technology (NIST) in September 2005 provides a great deal of data and evidence to support the thesis that Thermite was used in the destruction of the twin towers on 9/11.
The report includes many appendices which contain photographs and data confirming that many explosions occurred prior to the collapse and that molten iron was produced as a result. These "pressure pulses" produced molten iron and puffs of white smoke, which is precisely what would be produced in a Thermite reaction.
Although some reports claim that the molten metal is aluminum and the NIST report "assumes" it to be aluminum, molten aluminum in daylight conditions appears silvery and does not emit bright yellow and orange light due to the peculiar characteristic of aluminum of having low emissivity.
A high-resolution photograph (Fig. 9-71) of the northeast face of WTC2 was taken 4 seconds after one of the many "pressure pulses" that occurred in the tower before it collapsed. NIST provides no explanation for what caused these pressure pulses which ejected white smoke and debris from the tower in the seconds before it collapsed.
The white cloud seen in Fig. 9-71 has all of the characteristics of the aluminum oxide particles, or whitish smoke, which would be produced during a Thermite reaction.
A second or two after this photo was taken, massive amounts of molten metal poured from the window where the extremely bright flames are seen.
At 9:53:41 and 9:53:46 two more pressure pulses occurred, which were accompanied by flows of molten metal from the same window. The largest flow occurred during the second release, which is seen in the photo taken at 9:53:51 (Fig. 9-75) when the bright flow of molten metal from the top of window 80-255 was "prominent," according to the NIST final report.
The "pressure pulses" described by NIST appear to have been explosive reactions that produced white smoke and molten iron, precisely what a Super-Thermite reaction would produce. Super-Thermite is finely powdered aluminum and iron oxide which reacts like an explosive due to the extremely small size of the particles.
At 9:57:21, there was another pulse followed by a more intense pulse at 9:57:32. These pressure pulses greatly increased the flow rate of the molten metal, which would now be nearly continues until the tower collapsed, according to the NIST report.
The pressure pulses in the tower ejected debris which was seen being blown from the 80-81st floors of WTC2 from 9:58:49 until the tower collapsed 10 seconds later.
Photo: The bright reaction and white smoke in this photo of the South Tower followed one of the many pressure pulses described in the NIST final report. These reactions occurred in the minutes before the tower collapsed.
The evidence indicates that an aluminothermic reaction like Super-Thermite produced the molten metal, white smoke, pressure pulses, and extreme hot spots seen prior to the WTC collapse and found afterwards in the rubble.
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