I believe Dimitri Khalezov's 9/11 theory - that there were 3 nuclear devices below the foundations of Towers 1, 2 and 7. This caused the pulverization of the towers up to a certain height due to a shockwave moving upwards through the towers. You can find his videos on Youtube, and he has a few different websites too. Khalezov knew of these nuclear devices back in the 80's when working for the Soviet nuclear intelligence service, as the US shared information on all their nuclear devices when they signed the Strategic Arms Reduction Treaty with the Soviet Union.
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Triggered Charge Clusters in Metal explain the glowing hot Aluminium (melts before it glows ordinarily) and seemingly 'red hot' steel re-bar weeks after towers dustified.
With electromagnetic triggerring of Charge Clusters (think ball lightening) in metal, you can make it glow cold, make it turn to liquid - cold, atomise and float - all of these things are in NIST photos, videos and vocal testimony.
None of these things is possible with Nukes.