Native Americans march to a burial ground sacred site that was disturbed by bulldozers building the Dakota Access Pipelin | Robyn Beck / AFP/Getty Images
For months, the Standing Rock Sioux Tribe in North Dakota has been waging a pitched battle against a proposed oil pipeline that would run near their reservation — arguing that it would endanger both their water supplies and sacred sites.
These protests have become a huge, huge story. The fight over the Dakota Access Pipeline encompasses everything from the federal government’s historically appalling treatment of Native Americans to broader debates about fracking and climate change. The cause has attracted an array of tribes, activists, and environmentalists around the country, and authorities have been clashing with protestors all summer.
On Sunday, these clashes turned violent when law-enforcement officials used water cannons on protesters in freezing weather — sending some 26 people to the hospital with…