What a rescue mission for Columbia would look like

The accident investigation has pretty much come to the end. Just like the Challenger, it is a small item that caused the disaster. In Challenger it was the low temperatures turning the rubber O-rings brittle allowing hot gases to escape the solid rocket boosters. In Columbia, it was insulating foam damaging the wing which made it vulnerable to heat damage during re-entry. One question on the minds of many was: if NASA knew the wing was damaged could they have rescued the crew. This AP article on Yahoo! News describes what the rescue mission may have looked like.