Winter has arrived in Standing Rock at the Oceti Sakowin

Winter arrived in Standing Rock at the Oceti Sakowin Camp in North Dakota on Dec. 5, 2016, the day after the Army Corps of Engineers denied the easement needed to build the pipeline. Despite driving snow and 40-plus mile an hour wind a group of more than 700 veterans and water protectors marched toward the barricade on highway 1806. (Photo by Michael Nigro/Pacific Press/LightRocket via Getty Images)

Winter arrived in Standing Rock at the Oceti Sakowin Camp in North Dakota on Dec. 5, 2016, the day after the Army Corps of Engineers denied the easement needed to build the pipeline. Despite driving snow and 40-plus mile an hour wind a group of more than 700 veterans and water protectors marched toward the barricade on highway 1806. (Photo by Michael Nigro/Pacific Press/LightRocket via Getty Images)

Winter arrived in Standing Rock at the Oceti Sakowin Camp in North Dakota on Dec. 5, 2016, the day after the Army Corps of Engineers denied the easement needed to build the pipeline. Despite driving snow and 40-plus mile an hour wind a group of more than 700 veterans and water protectors marched toward the barricade on highway 1806. (Photo by Michael Nigro/Pacific Press/LightRocket via Getty Images)