Well who knows where the planes came from. They were certainly real planes though. Some people love to use their imaginations too much. Much like NASA having a base on the moon, and having a secret space force.. All utter garbage.
The projection of a SOLID image, which would be the jet, without somethhing behind it, whilst emitting a sonic boom made by the engines, is , impossible, with todays tech.
Now please dont tell me the US has secret tech like this to use. Because if the whole reason they did this to start a war in IRAQ etc, then they would have used super secret tech against Iraq and afganhistan to bring them under control. This didnt happen and the US wasted around, 1 trillion dollars on this war.
I like to think outside the square. I sit on the fence with 911. There are alot of unaswered questions. But to say the jets were an "illusion" or graphis is retarded.