I wondered when the conspiracy theorists amongst us would re-surface on this. Do you all have any idea how intensely these incidents are investigated? Between the NTSB and the FBI, who by law (2002) is the Incident Commander on all terrorists events in the US and who was the IC on this and other 9/11 incidents, this incident was analyzed and evaluated by the very best experts in the world. I have had the privilege of working with some of the individuals who respond to these, including the forensive pathologist (a PhD in forensics - dude came straight out of CSI) and a D-MORT specialist who responded to the WTC site. I was days away from being sent to the WTC site for a 4 month role, but circumstances changed.
In addition, literally hundreds of other local and regional agencies typically respond to these events, all under one command. They range from local law/fire/emeregency medical, etc. to regional/national experts, depending on what skillset is needed. It strains credibiilty to think that ALL of these experts would be either a part of the conspiracy or completely incompetent as to support the types of dumbass theories I see on the 'Net. The types of glaring would be inconsistencies 'noted' by the conspiracy theorists would be immediately noted by the cadre of professionals who work these incidents.
The PA incident is typical. The phone calls FROM the plane while it was in the sky are well known, including the very day of the incident. The black box supports that there was an attempt to breach the cockpit and the plane subsequently diving. There is no evidence within the black box that this plane was shot down. The plane reached the ground in one piece, and the rather soft re-claimed ground was a perfect place to enter without blasting into a billion pieces.
The US clearly indicated the day of these attacks that their air response was woefully inadequate and fighters were not able to respond quickly enough. All of this is a part of the record.
In addition, if 'someone' has 'special knowledge' of this event, or had such knowledge from a friend of a friend of a friend or a workmate of a workmate of a workmate, the NTSB and damn sure the FBI would have beaten a path to their door. To think that credible statements about this event would not have been listened to and verfiied if true is ridicuous to the nth degree.
I have said this before on this site: I KNOW these types of people. I have worked with many of them. They are the very best in the world at what they do, and believe it or not most of them are boyscouts, true blue, four square and love the US and the American Way. They receive some of the very best training on the planet and most have college degrees. The specialists often, as I stated, have advanced degrees and years of experience doing what they do. To place any credence in the 'Net conspriacy theories about this event and those like it is to believe in fairies, witches and hob-goblins.
Now that I've got that over, conspiracy theorists OTOH, typically have a high school dimploma and an Internet account.