NIST engineer John Gross spoke at a conference at UT Austin in 2007. He was asked to comment about the presence of molten steel at Ground Zero.
: “Have you analyzed the steel for any of those residues?”
: “I know of absolutely nobody, no eyewitnesses said so, nobody who’s produced it. I was on the site, I was on the steel yards, so I can’t …I don’t know that that’s so. It melts at around two thousand 600 degrees Fahrenheit…umm, I think it’s probably pretty difficult to get that kind of ..uh…temperatures in a… um,,,, in fire. So I don’t know the basis, I can’t address your question if I don’t know the basis.”
Here is a photo of John Gross, on the scrap yard, with his hands on a severely erdoed WTC7 beam. (There are actually three similar photos.)
This beam was the source of Sample #1 analyzed by Worcester Polytechnic Institute and reported in the FEMA 403 Report, Appendix C.
NIST engineers had direct evidence of molten steel from WTC7, yet claimed many times that they had no WTC7 steel to analyze.