Based on these observations, we conclude that the red layer of the red/gray chips we have discovered in the WTC dust is active, unreacted thermitic material, incorporating nanotechnology, and is a highly energetic pyrotechnic or explosive material.

Very interesting paper to say the least. So it is safe to say what this paper implies is that the Towers were brought down using a rather large amount of super thermite, that they believe might possibly been painted or sprayed directly onto the (columns) and that in the destruction chaos the unreacted ST that was directly in contact with the surface it was applied to did not react quick enough before being blown away into the dust clouds. Where it has been found in every single sample tested so far. They were able to apply a torch to the unreacted ST and watch the chemical reaction take place still all these years after the attacks.

Could these findings finally begin to unravel what really happened to the towers? Anyone interested in the towers destruction should really read this report. Its packed full of photos of the materials and graphs of test results.