Interesting stuff here! Not that I know too much about the details about 911.
Have you seen this?
He mentions two impossibilities in this video.
I can see three: the plane doesnīt change angle - at all, even though the plane moves into the picture and in perspective (hope you know what I mean). It is like a cut-out picture of a plane computer-animated (badly I might add, I know about these things...) by simply moving it through the picture.
Why didnīt they use 3D animation at least? This is cheap cut-out animation - at least of the plane! The "impact animation" where the plane goes into the building is 3D animation.
I always wondered how the plane could slide into the building so smoothly.https://www.youtube.com/watch?v=M6bk4dMjl4g
Gosh, this is interesting!! No doubt this is animation - I just donīt know who made it. Have to look at more videos of this.