A thick veil of campfire smoke hangs over tipis and tents Friday, Aug. 14 at the Oceti Sakowin campground. Mason Neck of Rosebud drapes a flag over his shoulder as he and more than 200 others march toward a Dakota Access pipeline construction site Saturday, Oct. 22 northwest of Cannon Ball, N.D. A man watches as North and South Dakota law enforcement officers move to block the advancement of a demonstration at a Dakota Access pipeline construction site Saturday, Oct. 22 northwest of Cannon Ball, N.D. A man is taken into custody by North Dakota law enforcement during a peaceful protest Saturday, Oct. 22 near a Dakota Access pipeline construction site northwest of Cannon Ball, N.D. Construction on the Dakota Access Pipeline begins on the east side of N.D. Highway 1806 at the former site of a frontline encampment. North Dakota law enforcement officials cleared the encampment three days prior, resulting in more than 140 arrests. Peta One Feather, 8, right, jumps out of the Cannonball River as he plays with his cousins Easton Condon, 4, and Achilles Condon, 3, Thursday, Sept. 1 at the Oceti Sakowin campsite. Two boys ride horses down a hill Thursday, Sept. 1 at the Oceti Sakowin campsite north of Cannonball, N.D. Unpa Nunpa, 48 of the Cheyenne River nation in South Dakota, sits with his grandson Kinya Luta, 5, at his campsite Saturday, Aug. 15 at Oceti Sakowin. A group of Dakota Access Pipeline protesters dismantle their tipi before packing up to leave the Oceti Sakowin campground on Wednesday, Dec. 7, 2016. Dan Nanamkin, 49, of Nespelem, Wash., stokes a fire near his campsite at Oceti Sakowin on Tuesday, Feb. 21, the night before the Army Corps of Engineer deadline to clear the campground. Nanmkin has been at the campground since September. Sandra O'Connor of Bainbirdge Island, Wash. prays next to a charred vehicle located in front of a law enforcement barricade on N.D. Highway 1806 near the Dakota Access Pipeline construction site north of Cannon Ball, North Dakota on October 29, 2016. A structure burns in the distance as Dakota Access Pipeline protesters work to clear the Oceti Sakowin campground on Feb. 22, the day the Army Corps of Engineers ordered campers to clear the area. North Dakota law enforcement officers slash and enter a tarpee during a raid on the Oceti Sakowin campground on Feb. 23 north of Cannon Ball, N.D. A Dakota Access Pipeline protester is arrested Morton County Sheriff's Department officers as North Dakota law enforcement begin to raid the Oceti Sakowin campground on Feb. 23, the day after the deadline to clear the camp near Cannon Ball, N.D. Nathan Phillips and other water protectors exit Oceti Sakowin Wednesday afternoon in a peaceful prayer march held for those choosing to leave the campground ahead of the deadline imposed by the Army Corps of Engineers. Raymond Kingfisher hugs loved ones as he gives a heartfelt speech thanking campers for their support and prayers at the Oceti Sakowin campground. Kingfisher led a march from the campground to the Standing Rock Sioux Reservation after his speech to lead campers who chose to leave before the official deadline to vacate the camp issued by the Army Corps of Engineers. A Navajo hogan burns next to a row of tarpees early Wednesday morning at the Oceti Sakowin campground. The remaining Dakota Access Pipeline protestors have been clearing debris and structures throughout the morning ahead of today's 2 p.m deadline to vacate the camp.