Yeah human error. And it could have done a lot more damage than it did, thankfully. Isn't that sort of the problem, that we wind up with "human error" in our human endeavors? Imagine the future, and your grandkids are living in a country filled with fission reactors run by Affirmative Action graduates. That ought to give one pause. We need less risky energy because, of course, niggers and spics and pajeets and mulattos exist, they are in our societies, and they would inevitably wind up being socially-promoted into positions of authority at future nuclear fission plants. Not to mention kikes pinching shekels and cutting corners.