On 9/11, How can a 757 only make a 16' hole when it is 125' wide?

The size of a Boeing 757 is approximately 125ft in width and yet images of the impact zone at the Pentagon supposedly caused by the crash merely show a hole no more than 16ft in diameter. The engines of the 757 would have punctured a hole bigger than this, never mind the whole plane. Images before the partial collapse of the impact zone show little real impact damage and a sparse debris field completely inconsistent with the crash of a large jetliner, especially when contrasted with other images showing airplane crashes into buildings.