A look back at September 11 through the lens of the theories that grew up around it, from controlled demolition claims about the Twin Towers to questions about what hit the Pentagon and why Flight 93 went down in a Pennsylvania field. Engineers, structural experts, and other specialists walk through the physical evidence, checking specific claims against building design, fuel loads, and impact physics rather than dismissing them outright. The film revisits the widely circulated arguments point by point, including the collapse of WTC 7 and the search for the missing Pentagon wreckage, and explains what the engineering data actually shows in each case. It treats the persistence of these theories as a real phenomenon worth accounting for, not just a fringe curiosity, while siding with the physical evidence over speculation. The result is less a debunking reel than a methodical cross-examination, useful for anyone who has heard the claims secondhand and wants to see them tested against the record.