To suggest a 6 ton titanium engine that slams into a concrete slab is going to leave it perfectly intact is absurd. That's why you went right to the wings and tail. They have the engine digging in the ground.
http://i14.photobucket.com/albums/a327/lytetrip/Pentagon/138b.jpg
The columns are blown UP AND OUTWARDS.
http://i22.photobucket.com/albums/b338/merc_mercy_/074-large.jpg
Firstly, the engine is not ALL titanium.
The engine would have been torn to pieces as it hit the external wall. It was moving forwards above ground level.
If the engine had gouged out the ground in front of the building then this would be apparent.
THAT is why your '6 ton titanium' engine did not damage the foundation.
You also seem to be under the impression that the ground floor slab is the foundation. It is not, so do try to get your terminology correct.
You then go on to use your extensive imaginary expertise to comment upon the condition of the columns. But you, like so many of your brethren have not the faintest idea what you are talking about.
Buildings contain a number of loadbearing elements in their fight against gravity. These elements are subject to loads which, when damage is caused to a structure, will make those elements move.
That the movement you see does not correspond with your preconception of how the building
should have looked after the crash is your problem, not mine.
But, consider this:
Just as with the shanksville crash, 'truthers' would have us believe that the evidence for the official account of events on 9/11 was faked.
And yet, we are also to believe that it was faked so badly that amatuer slueths armed only with their own over exhalted
common sense can see through this fakery.
That this fakery is not apparent to architects, structural engineers, demolition experts, fire engineers, air crash investigators et al, but is only apparent to yourself and the likes of killklown, should give you pause for thought.
It obviously doesn't, but it should.