The 9/11 Documentary/movie - anyone know anything about it? Actors? Style? Viewpoint?

Does anyone know anything about the 9/11 documentary? Ever since seeing the trailer on the news I have been slightly bothered by the thought of a movie about the 9/11 events. Who are the actors going to be? What inferences are going to be made about the Pennsylvania flight? Is it going to be narrated or is it going to be like a straightup movie?

What do you all think about a movie of the 9/11 events? What if they don’t pull it off with enough tact? Though I’d like to see it, I’m a little conflicted as to the validity it will portray…

Here’s an extended article on the various 9/11 projects in the works.

The 9/11 Documentary. As if there was only one?