Shipping crude oil by rail flourished in World War II -- and it has made a big comeback. There are now 20 crude-to-rail terminals along BNSF and Canadian Pacific tracks in North Dakota alone. More terminals are expected to be built in the East. "One of the reasons why the oil industry has really taken to heart the expansion of crude by rail is the flexibility," said John Miller, vice president of industrial products sales for BNSF. "If you load a unit train in North Dakota, you can go to the West Coast, you can go south or to the East Coast."

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