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Open Image ModalDakota Access Pipeline protesters celebrate as they march back to the Oceti Sakowin campground after they found out the Army Corps of Engineers denied the easement to drill under Lake Oahe on Sunday, Dec. 4, 2016. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalDrummers at the Oceti Sakowin campground perform a victory song. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalLance King, 33, an Oglala Lakota from Lyle, South Dakota, celebrates with Kayti Bunny after the announcement that the Army Corps of Engineers denied the easement to drill under Lake Oahe for the Dakota Access Pipeline. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalLita Boyd, a veteran of the U.S. Army, leads a group of veterans to the checkin area at the Oceti Sakowin campground north of Cannon Ball, N.D. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalCornel West speaks during a multi-faith congregation at the Oceti Sakowin campground. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalDakota Access Pipeline protesters celebrate after learning that the Army Corps of Engineers denied the drilling permit to drill under Lake Oahe near Cannon Ball, North Dakota. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalTamara Bliss Sharp of Oakland, Calif. prays at the Oceti Sakowin campground. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalDakota Access Pipeline protesters sing and celebrate after the Army Corps of Engineers announced they won\'t be granting the easement to drill under Lake Oahe. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalThousands gather in the main area of the Oceti Sakowin campground to celebrate after the Army Corps of Engineers announced they will not be granting a drilling permit. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalEvan Porter, a veteran of the U.S. Marine Corps, checks into the Oceti Sakowin campground. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalHorse riders meet at the Oceti Sakowin campground. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalTamara Bliss Sharp of Oakland, Calif. holds a pair of eagle feathers as she prays at the Oceti Sakowin campground. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalDakota Access Pipeline protesters participate in a victory march to the Oceti Sakowin campground. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalRob McHabey, right, a U.S. Navy veteran, walks with Ben Wright, left, a U.S. Army Veteran, at the Oceti Sakowin campground. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalDakota Access Pipeline protesters congregate on North Dakota Highway 1806 north of Cannon Ball, N.D. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalDakota Access Pipeline protesters celebrate as they watch a group of veterans march into the Oceti Sakaowin camp. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalTroy Fairbanks, right, of the Standing Rock Sioux tribe cheers after hearing Chief Arvol Looking Horse announce to members of over 300 nations that the pipeline\'s construction has been halted. (credit:Helen H. Richardson/The Denver Post/Getty Images)
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Open Image ModalActivist Brenda Cohen cries tears of joy as she celebrates at Oceti Sakowin camp on the Standing Rock Sioux Reservation. (credit:Helen H. Richardson/The Denver Post/Getty Images)
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Open Image ModalActivists hold hands during a prayer circle as they try to surround the entire camp at Oceti Sakowin Camp on the edge of the Standing Rock Sioux Reservation. (credit:JIM WATSON/AFP/Getty Images)
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Open Image ModalChief Arvol Looking Horse arrives to the Oceti Sakowin campground north. (credit:Josh Morgan for The Huffington Post)
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Open Image ModalActivists celebrate at Oceti Sakowin Camp on the edge of the Standing Rock Sioux Reservation. (credit:JIM WATSON/AFP/Getty Images)
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Open Image ModalA Sioux American flag hangs upside down at the encampment at Oceti Sakowin camp on the Standing Rock Sioux Reservation. (credit:Helen H. Richardson/The Denver Post/Getty Images)
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Open Image ModalTroy Fairbanks, right, of the Standing Rock Sioux tribe, holds back tears as he hugs a friend after hearing Chief Arvol Looking Horse announce, to members of over 300 nations, that the US Army Corps of Engineers will no longer grant access to the Dakota Access Pipeline to put their pipe line on the boundary of the Standing Rock Sioux Reservation. (credit:Helen H. Richardson/The Denver Post/Getty Images)
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Open Image ModalPeople celebrate in Oceti Sakowin camp as \"water protectors\" continue to demonstrate against plans to pass the Dakota Access pipeline near the Standing Rock Indian Reservation. (credit:Stephanie Keith / Reuters)
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Open Image ModalActivist Brenda Cohen cries tears of joy as she celebrates at Oceti Sakowin camp on the Standing Rock Sioux Reservation. (credit:Helen H. Richardson/The Denver Post/Getty Images)
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Open Image ModalNative American and other activists celebrate after learning an easement had been denied. (credit:Scott Olson/Getty Images)
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Open Image ModalPeople celebrate in Oceti Sakowin camp. (credit:Stephanie Keith / Reuters)
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Open Image ModalNative American and other activists celebrate. (credit:Scott Olson/Getty Images)
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Open Image ModalNative americans lift up their hands to celebrate their victory. (credit:Helen H. Richardson/The Denver Post/Getty Images)
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Open Image ModalArvol Looking Horse, spiritual leader of the Sioux nation, participates in a ceremony in Oceti Sakowin camp. (credit:Stephanie Keith / Reuters)
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Open Image ModalUS Navy veteran Bob McHaney, left, and Bill Runningfisher, of the Gros Ventre nation, right, press their fists together in solidarity while on a bridge near Oceti Sakowin Camp on the edge of the Standing Rock Sioux Reservation. (credit:Helen H. Richardson/The Denver Post/Getty Images)
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Open Image ModalActivists celebrate at Oceti Sakowin Camp. (credit:JIM WATSON/AFP/Getty Images)
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Open Image ModalU.S. Navy deep sea diving veteran Rob McHaney (C) holds an American flag as he leads a group of veteran activists back from a police barricade on a bridge near Oceti Sakowin Camp on the edge of the Standing Rock Sioux Reservation. (credit:JIM WATSON/AFP/Getty Images)
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Open Image ModalThe encampment at Oceti Sakowin camp on the Standing Rock Sioux Reservation. (credit:Helen H. Richardson/The Denver Post/Getty Images)
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Open Image ModalA woman looks out over the Oceti Sakowin camp as activists celebrate. (credit:Lucas Jackson / Reuters)