Something does not look right, if there was a scrap of titanium regardless of where it came from there should have been a quick runway check as is now a common practice in airport's today if this had been carried out then could it still be possible that the concorde would remain in the skies to day? I don't know about you all but when a fully laden fuel chugging aircraft capable of going-over the speed barrier is taking off on constant acceleration maybe some extra precautions would have helped. Anyway most aircraft incidents start off as small mistakes on the ground.