The following letter (with minor edits) has been sent to a scientist who recently contacted me regarding his intention to perform a study of the WTC dust, particularly the red/gray chips that we found in WTC dust samples. Included are some comments on a report by James R. Millette on red material which he found in WTC dust, sent to me by this scientist as a PDF file.

Dear [Interested Scientist],

Yes, I would encourage you to do a follow-up study on the World Trade Center dust, after you have carefully read our “Active Thermitic Materials...” paper. [Niels Harrit, Jeffrey Farrer, Steven Jones, et al. "Active Thermitic Material Discovered in Dust from the 9/11 World Trade Center Catastrophe", THE OPEN CHEMICAL PHYSICS JOURNAL, April 2009.]

Among the most salient observations in that paper are these:

1. the observation of elemental-iron-rich spheres in the ash following ignition of the red/gray chips in the Differential Scanning Calorimeter (DSC),
2. the sharp peaking of the heat-traces in each case for the ignition of red/gray chips in the DSC (Figure 19).