FILE- In this Dec. 3, 2016, file photo, law enforcement vehicles line a road leading to a blocked bridge next to the Oceti Sakowin camp where people have gathered to protest the Dakota Access oil pipeline in Cannon Ball,… . This Monday, Jan. 30, 2017, photo from video provided by KXMB in Bismarck, N.D., shows cleanup beginning at a North Dakota encampment near Cannon Ball where Dakota Access oil pipeline opponents have protested for months.