OK, clearly we must have know it was possible
So one of the arguments against being able to prevent 9/11 is that no one could have imagined such a scenario. I remember at the time there was much made of the fact that an author (Tom Clancy? Sorry, I just don’t remember enough of the details.) had written a book describing a similar situation, and that the idea had also been mooted for a Hollywood movie script. Granted these are not official sources of government information, so I’m willing to cut them some slack. However, I’ve linked previously to another article that would be considered an official government source.…