This Dec. 30, 2013 file photo shows a fireball going up at the site of an oil train derailment in Casselton, N.D. An effort by government and industry is under way to make the tank cars used to ship crude oil and ethanol safer, in response to a series of fiery train crashes, is becoming mired in squabbling and finger-pointing.



        Comments are not available on this story.

        filed under: