"Public caught off guard", because the events that day were so fast moving, no one would question them while the country was mourning their loses, in total disbelief and shock, not to mention the Neo-Con wars that followed. Its only been a few years after, after the shock wore off, that people began to look at this event differently, so did I
From what I have read, I do have first hand knowledge of some of the 'technology' used by conspiracy theorists to describe the entire 'plot', knowledge that I can not share with you, at least I am not supposed to. Because of this knowledge, I can say I am pretty sure 9/11 was indeed a 'false flag' operation as they call it. But with a purpose, entering a new kind of war that doesn't end, known as the Global War On Terror (GWOT). A vast, money making machine, for many. And as cliché as it might sound, the sociopathic Neo-Cons are behind it all, those who stand to benefit the most from a never ending (religious) war. The general public was 'asleep', I don't mean that literally, kept in the dark mostly by the media. As the internet has evolved, some people have 'awakened' and some are still 'asleep'. Keeping the public in fear is and has been the MO. That is all I am going to say on the matter.
Those of us who have awakened, just let these people play their games, it is best not to interfere, just 'watch' and pay attention to the moves from the sidelines. Once you do awaken, the fear subsides.