When considering the events of 9/11 you should always start with this question: how did Al Queda know that 9/11 was the best of all possible dates to launch the attack? This is due to the fact that there was a military exercise underway: on 9/11, that involved USAAF and Air National Guard fighters being scrambled to intercept 'imaginary' - hijacked by terrorists - civil aircraft that were to be flown into high status targets such as the World Trade Center. This caused a lot of confusion, as the events unfolded, because air force commanders couldn't tell 'real world' events from the 'imaginary' scenario set out in the exercise that they were all engaged in.
Have Al Queda got a super secret - and sophisticated - intelligence service that has completely penetrated America's security agencies? How could they have had prior knowledge of this exercise?
You can add to this the incredible 'coincidence' that an exercise that involved a scenario where terrorists blow up tube trains and buses in London was underway: in London on 7/7, when tube trains and a bus were blown up in the 'real world'.
The powers that be do, of course, rely on the fact that - for every person that employs a modicum of intelligent skepticism when viewing these events - there is at least 10 rednecks that swallow the official story hook line and sinker.
Intelligent skeptics need to stand up and speak louder.