AP photo
In this Nov. 17 file aerial photo, tractor-trailers line up for two miles, as they wait to unload oil in Trenton, N.D. Energy companies behind the oil boom on the Northern Plains are increasingly turning to an industrial-age workhorse — the locomotive — to move their crude to refineries across the U.S., as plans for new pipelines stall and existing lines can't keep up with demand.
Read the article: Trains carrying more oil across U.S.
