FILE - This Oct. 11, 2013 file photo shows cleanup at the site of a Tesoro Corp. pipeline break that spilled more than 20,000 barrels of oil into a Tioga, N.D., wheat field. The massive oil spill still isn't fully cleaned up three years and three months after it happened. The company responsible hasn't even set a date for completion. Some say that one of the largest onshore oil spills recorded in the U.S. serves as a cautionary example, especially given a recent pipeline break about 150 miles south and ongoing debates over the four-state Dakota Access pipeline. (AP Photo/Kevin Cederstrom, File)
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