what happened during 9/11

I knew what 911 was and what had happened because of people talking, through learning it at school and my family. But during this film that we watched, I never knew that they had an entire plan that that they hijackers had the idea of they were going to kill the pilots and one single passengers first so that they could gain control. This film I was very interested in because without this film, I wouldn't have actually know what went into detail throughout each one. They continued to talk about the two twin towers that the kids that were talking about it and saying that they weren't going to be standing and that they had an idea of what was going to happen with the attack coming up. Osama Bin Laden definitely had said certain things but no one would ever take him seriously with what he had to say.  With the two hijackers that planned this entire thing were not suspicious because they blended in well especially when they were going through flight school.