The gigantic blast that rocked Donetsk, Ukraine, apparently was at a chemical plant. Videos showing the gigantic explosion were being shared on social media websites and Internet forums, with some claiming it was small, “tactical nuke.” “This was caused by a dropped cigarette butt,” the Ukraine army’s Anti-Terrorist Operation spokesman, Andrey Lysenko, said, according to Russian state broadcaster RT.com. “Accidents often happen in factories where no one is responsible for fire safety. Well, it’s chaos, and they are barbarians.”