FILE - In this Dec. 30, 2013 file photo, a fireball goes up at the site of an oil train derailment in Casselton, N.D. The crash prompted new questions about the safety of oil transportation. On Wednesday, Jan. 15, 2014, Sen. John Hoeven, R-N.D., said the Department of Transportation needs to speed up its timeline for finalizing new rules on the construction of rail tanker cars. His comments came after an item published in the federal register indicated that new rules for tankers might not be finalized until sometime after January 2015. (AP Photo/Bruce Crummy, File)
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