Comment: That photo is one of the few which actually shows part of the

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fireant's picture

That photo is one of the few which actually shows part of the

hole created by the fuselage, but all photos of it are obscured by smoke. Note there is plenty of height for the fuselage.
The columns you point out were hit by the right wing; they are bent in the direction of travel. You can tell their damage was impact because the floor above, which they supported, has not dropped. It was lateral impact damage. Obviously, the columns won and the wing broke. If you will study the other side of the hole, you will note the left wing did sever some of the near columns. Why sever on the left but not the right? Angle of approach. The right wing hit flat, all at one time, spreading out it's mass. The left wing hit at it's strongest point first.
Only two people (according to your link) reported smelling cordite. Close inspection of the debris, both prior to and after collapse, show there is no evidence of a "powerful explosive device" other than what would be expected from the jet fuel. No one was killed above the second floor, and when the building collapsed at it's expansion joint, it was obvious no explosion damage reached above the second floor.

Undo what Wilson did