7/29    "We were actually quite surprised to hear we had some large pieces of
        debris fall off the external tank. It wasn't what we had expected ...
        Frankly, we were disappointed to hear that had happened ... What I'd
        like to say is this is something that has to be fixed ... I don't
        think we should fly again unless we do something to prevent this from
        happening again." -Commander Eileen Collins, Discovery