I must apologize. I was incorrect when I said that Steven Jones cited an EPA expert about the iron spheres who had provided in a report a reasonable explanation for them. I misremembered what I'd read.
What I was thinking of was a webpage that quotes a UC Davis air-quality expert named Thomas Cahill who testified at an EPA hearing. And what he said contradicted a statement by Christopher Bollyn in a May 24 article at GlobalResearch.ca titled "Why are Honest 9/11 Researchers Targeted". In that article Bollyn wrote "I took Jones' research to the University of California at Davis where I met with Professor Thomas Cahill. Cahill had collected data and analyzed the smoke (with a Davis DRUM) that rose from the WTC debris pile from early October until Christmas 2001. The extraordinary abundance of nano-size particles in the smoke indicated that the molten metal beneath the towers was hotter than the boiling point of iron and the other metals found in the bluish smoke. This is the kind of evidence that those who support the official version hate."
What I found in a document at xttp://delta.ucdavis.edu/WTC.htm (change the x to an h) was this:
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"The fuming World Trade Center debris pile was a chemical factory that exhaled pollutants in particularly dangerous forms that could penetrate deep into the lungs of workers at Ground Zero, says a new study by UC Davis air-quality experts.
The new work helps explain the very fine particles and extraordinarily high concentrations found by an earlier UC Davis study, the first to identify very fine metallic aerosols in unprecedented amounts from Ground Zero. It will be essential to understanding the growing record of health problems.
The conditions would have been "brutal" for people working at Ground Zero without respirators and slightly less so for those working or living in immediately adjacent buildings, said the study's lead author, Thomas Cahill, a UC Davis professor emeritus of physics and atmospheric science and research professor in engineering.
"Now that we have a model of how the debris pile worked, it gives us a much better idea of what the people working on and near the pile were actually breathing," Cahill said. "Our first report was based on particles that we collected one mile away. This report gives a reasonable estimate of what type of pollutants were actually present at Ground Zero.
"The debris pile acted like a chemical factory. It cooked together the components of the buildings and their contents, including enormous numbers of computers, and gave off gases of toxic metals, acids and organics for at least six weeks."
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The last line seems to offer a perfectly reasonable and relatively ordinary (ie, one not involving thermite) explanation for the composition of the dust Cahill found. Guess I overstated my case, didn't I.