Standing Rock encampment near Cannon Ball, North Dakota

CANNON BALL, NORTH DAKOTA - DECEMBER 4: US Navy veteran Bob McHaney, left, and Bill Runningfisher, of the Gros Ventre nation, right, press their fists together in solidarity while on a bridge near Oceti Sakowin Camp on the edge of the Standing Rock Sioux Reservation on December 4, 2016 outside Cannon Ball, North Dakota. Native Americans and activists from around the country have gathered at the camp to try to halt the construction of the Dakota Access Pipeline. (Photo by Helen H. Richardson/The Denver Post via Getty Images)