It is certainly true that no jetliner could have maneuvered
around obstacles within 100 feet of the building,
given an approach speed of 400 mph.
However there was damage to the fence and generator that
is arguably consistent with the profile of a 757 given
its apparent flightpath.
The generator, which was in the path of the starboard engine,
and a portion of the fence was knocked down.
Some have argued that the damage to the generator --
the dark object in the right in the photo --
was not in the correct orientation to have been produced by the engine.
However, we do not know if the generator was moved before the photo
was taken, nor whether it was hit by some other part of the plane,
such as one of the wing flap 'canoes'.