You bunch of freakin idiots, have you forgotten the last two fairly recent 2009 and 2013 blast of the same type in Texas? Geese you guy's have got to stop watching that BS Fox program, its not news just hallucination's. Welders started a accidental fire that got out of hand nearby, nothing more. Just as in most of the other cases the ammonium nitrate was being illegally stored.
LinkPhil