UPDATE: Okay, maybe just this: one thing that it makes clear is that everybody who was watching the live news coverage understood that we were at war before the towers collapsed. There was that period of confusion between the first plane hitting and the second, during which everybody right up to the top could not—or would not—believe that it was anything but a horrific, incomprehensible accident. But the instant that second plane disappeared behind the WTC, everybody suddenly knew what was going on and what it all meant. The towers collapsing, later in the day, was just to add insult to injury; the attack and all its implications had already been established. Which means that all those conspiracy-heads running around in circles over controlled demolitions and external missile packs can kindly just go find something more useful and socially redeeming to do with their time, like practice burping the alphabet.