9/11 researcher Dr. Steven E. Jones of Brigham Young University, in a newly published paper entitled "Revisiting 9/11/2001 – Applying the Scientific Method," explains the important physical evidence of Thermite (and its analogues such as Thermate) found in the dust of the World Trade Center. This paper discusses the tiny iron-rich spheres, some as large as 1 or 2 mm, which were found in great abundance in the dust from the WTC.
Based on the mass of these iron-rich spheres found in a sample of the dust found in a nearby apartment, Jones estimates (roughly) that about .04 percent of the dust was "iron-rich spherule," which would be "of the order of ten tons." This gives us some idea of how much Thermite (Thermate, etc.) was in the twin towers.
This paper is highly recommended and deserves a careful reading by those who are interested in the physical evidence that Thermite-type aluminothermics were used to bring down the largest steel and concrete towers in the world on September 11, 2001.
I have provided a few snips from Jones' paper below. The entire paper is available online as a PDF file at:
Just copy and paste the link.