Now, whether or not the White House looked the other way at incoming intelligence, allowing it to happen is certainly up for debate. I for one believe they looked the other way, not out of malicious intent but sheer ineptness. This happened on Dubya's watch. Therein lies the difference between Politics and Business. The CEO of a major corporation would have been tossed out on his ass for ignoring warning signs about a malicious attack. Voters were stuck with him another 3.5 years and then were dumb enough to put him back in.
If there were a credible conspiracy story to tell, Oliver Stone would be telling THAT story.
But back to the topic at hand, this isn't the first 9/11 movie. Technically it isn't even the second. The best 9/11 movie is 9/11. The documentary shot by two German filmmakers who were doing a bit on one of the firefighters of NYC that day caught the real spirit of the day.
I haven't seen United 93, but it seems far more respectful of 9/11 than this cheesy cash-in. This looks like something that should go on the shelf beside Michael Bay's Pearl Harbor.