I didn't want to watch last night, because I really hate listening to celebrities and news anchors talk about the "horror of it all". But that documentary was a completely different thing. It is so important to watch and understand and, at some level, feel what those people felt that morning. I never want to forget the loss and intensity of that day. Watching the special just added another layer to my emotions of that day.
If you missed it, go and get it. It's worth it- very well done.