Worth Re-iterating

What "flight 77" had to go through to make the "exit hole" on the A-E drive, if you count all the walls from the outside to the exit hole : 6 feet of regular concrete, 5 feet of steel reinforced concrete, 16" of brick and 6" of limestone. This is a conservative estimate.

Considering the plane pretty well blew up when it impacted the first outside wall, I say, there is no way in hell that flight 77 made the exit hole-- or blew out the other doors and windows on the A-E drive, for that matter.

So-- what accounts for this damage??????