Photos: Standing RockAn encampment north of Cannon Ball, N.D., where protesters are fighting an oil pipeline that the Standing Rock Sioux argue would cross treaty lands, desecrate sacred burial grounds and cultural sites and put the local water supply at risk.BARBARA J. MINER"Water is Sacred" is the message protesters in North Dakota are pressing as they fight an oil pipeline.BARBARA J. MINERA sign at the main encampment where protesters are fighting a plan to build an oil pipeline that the Standing Rock Sioux say would cross tribal lands.BARBARA J. MINERA light dusting of snow covers an encampment north of Cannon Ball, N.D., where protesters are fighting an oil pipeline that the Standing Rock Sioux argue would cross treaty lands, desecrate sacred burial grounds and cultural sites and put the local water supply at risk.BARBARA J. MINERAnother view of the main encampment near Cannon Ball, N.D.BARBARA J. MINERThis was one of four actions taken by protesters on Thanksgiving Day, this one on the highway just outside the encampment.BARBARA J. MINEROne of several protests that took place on Thanksgiving Day.BARBARA J. MINERBruce LaMere, a member of the Ho-Chunk Nation, lives in Tomahawk, Wis. He is holding the Ho-Chunk flag.BARBARA J. MINERAn elementary school for 6- to 13-year-olds at the water protectors' encampment. It has a tepee, a yurt (a portable round tent), and also in the works is a long-house for the winter.BARBARA J. MINERA demonstration on Nov. 21 in downtown Bismarck, the state capital, about 40 miles north of the encampment.BARBARA J. MINERProtesters at a demonstration Nov. 21 outside the Morton County Sheriff's Department in Mandan, N.D., praying silently to underscore their non-violent purposes.BARBARA J. MINER