I note with some amusemment that you appear to have ignored this Lyte, presumably on the basis that those pesky facts and real technical issues get in the way of your theory. Nice but of rounded analysis on your part, sir.
And now I think of it, if the damage took the form of fractures rather than displaced material then it wouldn't show up on your kack-handed photographic analysis anyway.

For your information, the foundation is the section of load bearing wall footing which carries the weight of the building down to a suitable strata, usually a firm clay. In a building such as the Pentagon one would anticipate it to be in-situ reinforced concrete, although masonry [ETA on a concrete strip] would also be possible. It will typically extend to depths of 450 to 1200mm below ground level. The excavation trench will be backfilled, either in selected as-dug material or in a suitable hardcore.
Now, if something impacted the foundation the first question would be what happened to all the earth (and other material) encapsulating it in the first place? Would it have absorbed or dissappated some or all of the impact? The second question would be the extent to which the material to the rear of the footing would have prevented severe deformation of the foundation. And of course we'd also want to look at the strength of the founds.
Now go away and do your homework properly, before pretending to be an engineer.
And now I think of it, if the damage took the form of fractures rather than displaced material then it wouldn't show up on your kack-handed photographic analysis anyway.

