Problem is, nobody knows the answer. Not you, not I. So it's a pointless question.
There are many conspiracies. Most of them are very interesting. JFK, 911, the moon landing, global warming, 2012 etc etc.
911 may well have had some assistance from people within the united states, trouble is its all conjecture. You don't know for sure, nobody does. That is why its a conspiracy.
To claim the jets were computer generated graphics is ridiculous.. There is that better? They were physical objects, who owned them and where they came from cannot be answered as no wreckage, or flight recorder has been found.
This plane would have been the proverbial needle in a hay stack. Problem is that needle was made of string and that hay went up in fire.
