As far as I'm concerned, we already knew the truth. If this had been a 747 instead of a Cessna, the military would have been even less likely to shoot it down, because of (1) the higher probability that it's just some kind of error and (2) collateral-damage issues (killing innocent passengers and concern for people on the ground). Thoughtful people know this already. As long as terrorists don't gain control of any large planes, we have nothing to fear.
Bruce