After Ohio train derailment, tank cars didn’t need to be blown open to release chemical, NTSB says

Read MoreThe head of the National Transportation Safety Board told Congress Wednesday that the decision to blow open five tank cars and burn the toxic chemical inside them three days after a Norfolk Southern train derailed in Eastern Ohio last year wasn’t justifiedThe head of the National Transportation Safety Board told Congress Wednesday that the decision to blow open five tank cars and burn the toxic chemical inside them three days after a Norfolk Southern train derailed in Eastern Ohio last year wasn’t justified