Not to be argumentive but I don't belive that. The shuttle was descending. The point of maximum heat stress in a normal descent would've been over Texas. I think the force of the atmosphere caused the damaged tiles to cause other tiles to come off over California. Then at maximum heat stress over Texas burn through occurred.
BTW, I don't trust ANY of the pictures we've seen so far.
If that video showing the left wing impact was shown before the tragedy, then I would guess it's trustworthy.
Actually, at the moment they broke up there were, in fact, at the maxium point of descent.
Then what about my post are you disagreeing with.