Awful documentary. They chose to give an extraordinarily large amount of air time to two notorious conspiracy theorists. But the kicker is that you don't know that they are conspiracy theorists until halfway through the documentary! Outrageous. To call this documentary irresponsible is being too kind. It was actually a manipulation of the worst sort: They introduce expert sources, and you believe them, but then you realize that they are conspiracy theorists. The proposed explanations of what happened (except for the first) we're absolutely absurd! If you really want to learn the truth about what happened, go elsewhere.