That would have required removing or cutting columns with welding torches and placing wires for demolition. NIST found that window breakage patterns on visible floors was not at all like expected from a blast. NIST did not test residue from the attacks for thermite, but did note that thermite burns slowly relative to explosive materials. and would require several minutes in contact with a massive steel section to heat it to a temperature that would result in substantial weakening. (11:39–11:47)
CLAIM
Asserts that NIST did not test for thermite but noted its slow burn compared to explosives.
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