Actually, I think there is only one video shot of the first plane impact on the WTC. Maybe the Pentagon isn't the object of a lot of tourists' shots, but you'd think it would be, along with the WH, Congress, and the memorials. Or maybe there isn't a good place from which to get a still pic of the Pentagon. I just thought it odd, and it wouldn't surprise me if, like in the JFK assassination, years after the fact people came forward with other photos.http://www.defenselink.mil/photos/Sep2001/010914-F-8006R-006.html
That's a defense department aerial photo of the damage to the pentagon. It looks like the only places to get a clean shot of that side of the building is from the Pentagon grounds, from the air or from the highway (I-295?).