I don't care if the plane was shot down or not. We know for certain that the passengers, followed Todd Beamer's charge of "Let's Roll", and they were at least making an attempt to overcome the terrorist bastards. Whether or not they got help from an F-16 or not is irrelevent, imo.
I am satisfied that the government admits that the order to engage was given by the VP, and that there is evidence of the passenger's heroic intentions. This is one of the few occasions that the exact truth doesn't matter.
Those concerned with the 3 seconds need to let it go.