That's true. I guess we'll have to make a few assumptions here, huh? I think that the government, even if not many people could do much, would at least make it look somewhat legitimate. It'd probably be a lot easier to hijack one of their own planes and crash it. You might say it wouldn't bring down the buildings and be as devestating, but I don't think it'd make much of a difference whether they stood up or simply a plane did crash into them and destroy quite a bit. Maybe not as many people would die, but it'd still be a national tragedy that would "warrant" the invasion of a foreign country. 9/11 was "meant to" instill fear of terrorists into people's hearts. If the government truly couldn't be overthrown, they probably wouldn't care to topple the entire buildings and lose a bit more money in the process. You'd still be pretty outraged if you heard terrorists crashed planes into important buildings.

By all means, Bush could've done it, but I really don't think he did it the controlled demolition way.