Dave Archambault, chairman of the Standing Rock Sioux Tribe, stands outside court in Washington in October 2016, where appeals court judges heard his tribe's challenge to the Dakota Access Pipeline. Jessica Gresko/AP hide caption
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Protesters opposing the proposed Dakota Access Pipeline at the Oceti Sakowin Camp in North Dakota. Lawmakers in the state have proposed bills that would increase penalties for protesters who block highways. Michael Nigro/Getty Images hide caption