Actually, I might as well post a link to the source I used for those images:
It's a point-by-point critique of Loose Change.
Kevin Ryan, their expert on the steel, tested water, not steel. He had nothing to do with the steel in the building. Underwriters Laboratories did not certify steel. A message from UL:
Mr. Ryan wrote the letter without UL's knowledge or authorization. Mr. Ryan was neither qualified nor authorized to speak on UL's behalf regarding this issue. The opinions he expressed in the letter are his own and do not reflect those of Underwriters Laboratories Inc..."