This is second hand information, but I was told that Sky News (presumably in the UK) played a video segment demonstrating how one could use Microsoft Flight Simulator 98 to crash into the Pentagon.
Presumably the point they were trying to make was that a person who'd done that would be able to leap into the cockpit of a real aircraft and do the same.
I am in the US and searched their website, but could not find the video. If it is indeed true that Sky ran this piece, then I am absolutely sickened and saddened that any member of the press would stoop to such levels of sensationalism at such a time!!!