I read it, and believe some of what they're saying. But I dont need convincing that there is more to the story.
The problem with most truthers is that they want to focus so much on believing this was a deep seeded govt conspiracy. To me its plainly obvious that Larry Silverstein was not only involved but also the mastermind/financier. From that point and below, I do believe the official story. I believe OBL organized the group of terrorists who took flying lessons, hijacked a plane, and flew it into a building, all believing that they were commiting an act of terrorism, not that they were part of a bigger scheme.