but this made me feel better:
Their worry was not that Endeavour might be destroyed and its seven astronauts killed in a replay of the Columbia disaster; the gouge is too small to be catastrophic. They were concerned that the heat of re-entry could weaken the shuttle's aluminum frame at the damaged spot and result in lengthy postflight repairs.
In essence they decided to not pursue a fix via a risky spacewalk for something not felt to be catastrophic. Still, I hope they're not horribly wrong.
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