 In this Thursday, Dec. 1, 2016 photo, Elena Ruben Goodman, of Oakland, Calif., waits her turn to pray by the Cannonball river during a Native American water ceremony at the Oceti Sakowin camp where people have gathered to protest the Dakota Access oil pipeline in Cannon Ball, N.D. On Thursday, the camp near the confluence of the Missouri and Cannonball rivers was shrouded in snow, much of it compacted by foot and vehicle traffic. Next week's forecast calls for single digits and subzero wind chills. (AP Photo/David Goldman) 