I know this sounds like a horrible disaster, amd it is in a way, but we must count our blessings. There was no loss of human life and the fires are extinguished now so they are getting the situation under control. It is not known what caused the leak, so it is not fair to be charting it up to human error or low safety measures. it could have been an accident. And yes, to all you paranoid pessimists, accidents do exist, they aren't some urban legend.