Well most people now have a rough idea it was an 'inside job' anyway. Although inside job may not be the correct term. Basically i've not come across anyone who has looked at all the evidence and still believes the official story. Not that i'm saying I know how it was orchestrated but there are a number of scenarios with the official story being the least likely.
A rough idea? 
When citation is required to your 'everyone knows this', a rough idea doesn't really cut it.
But a rough idea of Bin Laden and Co. executing such a complex attack from a cave just because the bbc or the daily mail says so is perfectly acceptable and sheer gospel. Works both way does it not?
I don't think the BBC or Daily mail had any infulence inside Whitehall, you know.
More likely the other way around mate.
Look, you're not making any sense.
The other way round would be the BBC and the Mail reporting on what's going on, so what the hell has that got to do why why Whitehall decided the military went in? Nothing, that's what.