Maybe after the original 9/11 we should’ve pretended the towers were brought down by windshear. Better yet, that they’re still standing. If you don’t point to empty space and say, “Gosh, the twins look beautiful today,” the terrorists win.
As crazy as it sounds, I'll bet if there had just been just one hijacked airliner that took down one of the World Trade towers, the government would have claimed it was an "accident". After all, this is the same government that claims TWA 800 suffered a spontaneous combustion of its fuel tank, and proceeded to threaten any witnesses who claimed to have seen a missile strike. Explosive residue found on the TWA 800 was passed off as having been due to an earlier "bomb sniffing training exercise".
The bottom line is big governments don't like to be seen as fallible, and they will do anything to project the myth they are fully in control of the situation.