A lot of people saw that plane huh? Name one.

I live here and I saw one guy interviewed on Ch 7 who claimed he saw a plane but the TV station will not release his name or address.

No one on the GW Parkway came forward claiming to see a low flying plane.

The FBI supposedly took film from every possible camera in the area that could have glimpsed a plane in the area.

Why no pictures even now?

Every scenario can have some coincidence to it I suppose.
Like that 200 foot span of the Pentagon being the only section of the Pentagon that underwent special reinforement construction back in 2000.

A tree could fall in the forest and nobody will see it, but it is unlikely in Washington DC.