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, N.D. North Dakota Sen. John Hoeven said Tuesday, Jan. 31, 2017, that the Acting Secretary of the Army has directed the Army Corps of Engineers to proceed with an easement necessary to complete the Dakota Access pipeline.