Photos of the North Dakota pipeline protest

Background on the Standing Rock Sioux pipeline protests and how social media and climate activism raised their profile.

  • Native American protestors ride horses into the construction site for the Dakota Access pipeline on Aug. 27. The pipeline is slated to extend from North Dakota to Illinois, carrying crude oil from the Bakken shale play. The federal court has postponed a decision for continued development until Sept. 9, 2016.

  • A man brandishes a Yankton Sioux Tribe flag at the protest against the Dakota Access Pipeline. Dozens of tribes have joined the Standing Rock Sioux Tribe in their fight against the pipeline construction.

  • People ride horses through a camp where the Cannonball River flows into the Missouri, along the proposed route of Dakota Access pipeline. More than 1,000 people, most Native American, have gathered at two prayer camps to protest the pipeline.

  • A family plays in the Cannonball River, which forms the northern border of Standing Rock Indian Reservation in North Dakota. One of the protest’s rallying cries is “Mni wiconi” which is Lakota for “water is life” because they are dedicated to protecting the water resources of the Missouri River.

  • Shamirra Salomen, left, of Rapid City, South Dakota, and Kiara Gomez, of Eagle Pass, Texas, ride a horse at a prayer camp where tribal members and other protestors have gathered to oppose the Dakota Access pipeline.

  • Darrin Old Coyote, chairman of the Crow Nation, enters a prayer camp with Nigel Stewart, left, and Taylor Real Bird, right, both Crow tribal members and U.S. military veterans, to offer support to the Standing Rock Sioux’ fight against the Dakota Access pipeline. The Crow and Sioux nations were once enemies, and Old Coyote's appearance was considered a historic event by many in attendance.

  • Native American protestors march from an encampment on the banks of the Cannonball River to a nearby construction site for the Dakota Access pipeline to perform a daily prayer ceremony. The Standing Rock Sioux tribe filed an injunction against the U.S. Army Corps of Engineers in federal court in Washington DC, claiming that the Army Corps did not take tribal spiritual and heritage sites into consideration when it granted permits for the pipeline.

  • A girl peers into a drainage pipe under an access road during a daily prayer ceremony at a construction site for the Dakota Access pipeline.

  • Men gather for a sacred prayer pipe ceremony at the Seven Council camp in North Dakota.

  • A fire burns outside the tribal council lodge in which the Seven Councils of the Oceti Sakowin (Sioux) have gathered for the first time in over 100 years, according to Standing Rock Indian Reservation chairman Dave Archambault II.