Look, this shouldn't be that hard to follow.
We are discussing, for the purposes of example 2 plane crashes. One in the Pentagon (allegedly, for your sake), and Shanksville, PA.
You claim that because of the fact that no tail section was recovered from the Pentagon, it wasn't a plane that caused the explosion.
I then post a picture of the Shanksville crash in which the impact crater is visible, yet there is also no tail section there.
It should be obvious then, that similar planes, with similar fuel loads, going similar speeds, would appear similar when they crash, i.e., no large pieces of debris.
That is the essence of my argument. I mentioned eyewitnesses elsewhere, but that has no bearing on this discussion.