Standing Rock protests against the Dakota Access Pipeline

CANNON BALL, ND - DECEMBER 4: One day before a government order to leave the area, the United States Army Corps of Engineers announced that a permit to build a pipeline under the Missouri River Just outside of the Lakota Sioux reservation of Standing Rock, North Dakota, was denied and the self described "water protectors" celebrate the news, December 4, 2016. Over two hundred tribes, joined by environmental activists and hundreds of United States military veterans, camp and demonstrate against the Dakota Access Pipeline, which plans to be built under the Missouri River adjacent to the reservation. The gathering has been the largest meeting of Native Americans since the Little Bighorn camp in 1876. (Photo by Andrew Lichtenstein/Corbis via Getty Images)