Article Photos: NTSB: Oil train crash risks 'major loss of life' 1/1

FILE - In this Dec. 30, 2013 file photo, a fireball goes up at the site of an oil train derailment in Casselton, N.D. Warning that a "major loss of life" could result from an accident involving the increasing use of trains to transport large amounts of crude oil, U.S. and Canadian accident investigators urged their governments to take a series of safety measures. The oil train derailed and exploded near Casselton, N.D., creating intense fires. The accident occurred about a mile outside the town, and no one was hurt. Rail lines run through and alongside the town. (AP Photo/Bruce Crummy, File)