a plausible explanation for thermite found in the 911 dust, other than the obvious

no clear chain of custody active Thermitic Material Discovered in Dust from the 9/11 World Trade Center Catastrophe The Open Chemical Physics Journal, SEO then Alex Jones and others moved the goal posts to nano-thermite, after The Energetic Materials Research and Testing Center performed a thermite test and were unable to cut a vertical column, despite the column being much smaller than those used in the World Trade Center.

https://www.metabunk.org/investigating-active-thermitic-material-discovered-in-dust-from-the-9-11-wtc-catastrophe.t9485/

Have you ever looked into the thermite found in the 9/11 dust? And the iron spheres (thermite reaction product) found in large quantity in the dust? I’ve never heard a plausible explanation for that evidence other than the obvious.?
http://archive.is/tDGd9