Keith Cowing says that this is more bad news for NASA, but I disagree. If the cause was worker carelessness, at least we now know what it is, and it’s easily fixable, by retraining workers, or hiring new ones. Ideally, of course, you’d like to have a system that’s not so sensitive to the individuals who have to implement it, but at some point, the people are part of it, and you have to look for quality there as well.