This story originally appeared on ProPublica. The oil boom underway in North Dakota has delivered jobs to local economies and helped bring the United States to the brink of being a net energy exporter for the first time in generations.But moving that oil to the few refineries with the capacity to process it is presenting a new danger to towns and cities nationwide 2014 a danger many appear only dimly aware of and are ill-equipped to handle.Much of North Dakota's oil is being transported by rail, rather than through pipelines, which are the safest way to move crude.