Find the Boeing
So now I find out that we can't even be sure that an actual airplane hit the Pentagon. This guy's site is far from conclusive, but some of those pictures are unusually free of airplane-scale destruction and debris. And then there's the changing stories. The changing stories always bother me -- probably because they make visible too much of the grime surrounding the fact-reporting process. I remain unconvinced, but I'll keep my ears open for any other scurrilous rumors.
One unequivocally good thing at least, there's a link to some really gigantic jpeg's that the army provides on this website. There's something mesmerizing about scrolling across this many pixels of anything, let alone the pentagon in flames.