I wrote this letter in a spirit of annoyance. Very shortly after the 9/11 events the world began to be gifted with articles, sometimes co-authored, by a gentleman named Zdeněk Bažant. We were assured that he was a distinguished engineering professor and that his explanations of the destruction of the World Trade Center—not only supportive of the official story but useful in its initial construction—were to be taken seriously. But when I read his attempt to explain away eyewitness evidence of explosions (as sonic booms occurring during gravity-driven building collapse) I was offended. Having spent hundreds of hours studying the eyewitness evidence, I found his treatment flippant, superficial and unscientific.