At the time the "official report" was made concernng the non-shoot-down of Flight 93, no one in power knew whether or not some farmer might have been videoatping his prize pig in a pen and suddenly swung his camera to catch the "shoot-down".
Also, there is no chance any air traffic control group could keep such a secret.
In short, there is no chance this was a shoot-down. No chance.
Because there is no cover up. 93 was not shot down.
PackerBoy: I cannot believe that Bush would participate in a cover-up of this magnitude.
Fighting Irish: Because there is no cover up. 93 was not shot down.
To the best of my knowledge, no interviewer has ever asked Bush [or Cheney], "Mr. President [or Mr. Vice President], can you say conclusively, and unequivocally, that no branch of the United States military, to include the United States Air Force, but not limited thereto, was involved in the downing of United Airlines Flight 93, on the morning of September 11, 2001?"
It would be interesting to the response.