Veterans return to camp after marching to the highway 1806 bridge north of the Oceti Sakowin Camp on Monday, Dec. 5, 2016 near Cannon Ball. Officials had been staffing the bridge full time but have said they are going to cut back.

Veterans return to camp after marching to the highway 1806 bridge north of the Oceti Sakowin Camp on Monday, Dec. 5, 2016 near Cannon Ball. Officials had been staffing the bridge full time but have said they are going to cut back.

Heinz Brummel from Minneapolis works to construct a yurt paid for through a GoFundMe campaign put on by Indigenous Roots on Saturday, Dec. 3, 2016 near Cannon Ball.

Heinz Brummel from Minneapolis works to construct a yurt paid for through a GoFundMe campaign put on by Indigenous Roots on Saturday, Dec. 3, 2016 near Cannon Ball.

Tamara Sharp of Oakland, CA prays with other demonstrators at the Cannonball River during the morning prayer along the banks of the in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 in Cannon Ball.

Tamara Sharp of Oakland, CA prays with other demonstrators at the Cannonball River during the morning prayer along the banks of the in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 in Cannon Ball.

Abigail Gallant, a masseuse and yoga instructor from Massachusetts, practices yoga along the Cannon Ball river in the Oceti Sakowin Camp near the Standing Rock Reservation on Saturday, Dec. 3, 2016 near Cannon Ball. Gallant said she want to come hel

Abigail Gallant, a masseuse and yoga instructor from Massachusetts, practices yoga along the Cannon Ball river in the Oceti Sakowin Camp near the Standing Rock Reservation on Saturday, Dec. 3, 2016 near Cannon Ball. Gallant said she want to come help in any way she could and that she helps heal the protestors when they need it.

Heinz Brummel from Minneapolis works to construct a yurt paid for through a GoFundMe campaign put on by Indigenous Roots on Saturday, Dec. 3, 2016 near Cannon Ball.

Heinz Brummel from Minneapolis works to construct a yurt paid for through a GoFundMe campaign put on by Indigenous Roots on Saturday, Dec. 3, 2016 near Cannon Ball.

Tamara Sharp of Oakland, CA prays with other demonstrators at the Cannonball River during the morning prayer along the banks of the in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 in Cannon Ball.

Tamara Sharp of Oakland, CA prays with other demonstrators at the Cannonball River during the morning prayer along the banks of the in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 in Cannon Ball.

Popz Longwalker puts on his native jewelry in the hut he and his wife, Dawne of a new day DuShane, share in the Oceti Sakowin Camp on Monday, Dec. 5, 2016 near Cannon Ball. The couple left home in Norman, OK and put what they had in storage saying t

Popz Longwalker puts on his native jewelry in the hut he and his wife, Dawne of a new day DuShane, share in the Oceti Sakowin Camp on Monday, Dec. 5, 2016 near Cannon Ball. The couple left home in Norman, OK and put what they had in storage saying they just taking it a day at a time here.

Popz Longwalker puts on his native jewelry in the hut he and his wife, Dawne of a new day DuShane, share in the Oceti Sakowin Camp on Monday, Dec. 5, 2016 near Cannon Ball. The couple left home in Norman, OK and put what they had in storage saying t

Popz Longwalker puts on his native jewelry in the hut he and his wife, Dawne of a new day DuShane, share in the Oceti Sakowin Camp on Monday, Dec. 5, 2016 near Cannon Ball. The couple left home in Norman, OK and put what they had in storage saying they just taking it a day at a time here.

Demonstrators stay warm as the sun sets in the Oceti Sakowin Camp near the Standing Rock Reservation on Saturday, Dec. 3, 2016 near Cannon Ball.

Demonstrators stay warm as the sun sets in the Oceti Sakowin Camp near the Standing Rock Reservation on Saturday, Dec. 3, 2016 near Cannon Ball.

Demonstrators stay warm as the sun sets in the Oceti Sakowin Camp near the Standing Rock Reservation on Saturday, Dec. 3, 2016 near Cannon Ball.

Demonstrators stay warm as the sun sets in the Oceti Sakowin Camp near the Standing Rock Reservation on Saturday, Dec. 3, 2016 near Cannon Ball.

Michael Hopkins, 59 of Neenah, WI, holds a mirror and he and other demonstrators prepare to practice an art demonstration intended to reflect the police officers aggression back to them according to native artist Rory Erler Wakemup in the Oceti Sako

Michael Hopkins, 59 of Neenah, WI, holds a mirror and he and other demonstrators prepare to practice an art demonstration intended to reflect the police officers aggression back to them according to native artist Rory Erler Wakemup in the Oceti Sakowin Camp near the Standing Rock Reservation on Saturday, Dec. 3, 2016 near Cannon Ball.

Michael Hopkins, 59 of Neenah, WI, holds a mirror and he and other demonstrators prepare to practice an art demonstration intended to reflect the police officers aggression back to them according to native artist Rory Erler Wakemup in the Oceti Sako

Michael Hopkins, 59 of Neenah, WI, holds a mirror and he and other demonstrators prepare to practice an art demonstration intended to reflect the police officers aggression back to them according to native artist Rory Erler Wakemup in the Oceti Sakowin Camp near the Standing Rock Reservation on Saturday, Dec. 3, 2016 near Cannon Ball.

The Oceti Sakowin Camp near the Standing Rock Reservation on Saturday, Dec. 3, 2016 near Cannon Ball.

The Oceti Sakowin Camp near the Standing Rock Reservation on Saturday, Dec. 3, 2016 near Cannon Ball.

The Oceti Sakowin Camp near the Standing Rock Reservation on Saturday, Dec. 3, 2016 near Cannon Ball.

The Oceti Sakowin Camp near the Standing Rock Reservation on Saturday, Dec. 3, 2016 near Cannon Ball.

Veterans gather to march on the highway 1806 bridge north of the Oceti Sakowin Camp on Monday, Dec. 5, 2016 near Cannon Ball. Officials had been staffing the bridge full time but have said they are going to cut back.

Veterans gather to march on the highway 1806 bridge north of the Oceti Sakowin Camp on Monday, Dec. 5, 2016 near Cannon Ball. Officials had been staffing the bridge full time but have said they are going to cut back.

Veterans gather to march on the highway 1806 bridge north of the Oceti Sakowin Camp on Monday, Dec. 5, 2016 near Cannon Ball. Officials had been staffing the bridge full time but have said they are going to cut back.

Veterans gather to march on the highway 1806 bridge north of the Oceti Sakowin Camp on Monday, Dec. 5, 2016 near Cannon Ball. Officials had been staffing the bridge full time but have said they are going to cut back.

Chief Arvol Looking Horse, listens as speakers address the crowd in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Chief Arvol Looking Horse, listens as speakers address the crowd in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Chief Arvol Looking Horse, listens as speakers address the crowd in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Chief Arvol Looking Horse, listens as speakers address the crowd in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Tribal leaders walk into the drum circle at the Oceti Sakowin Camp after the Army Corps of Engineers denied Dakota Access an easement to cross the Missouri River on Sunday, Dec. 4, 2016 near Cannon Ball.

Tribal leaders walk into the drum circle at the Oceti Sakowin Camp after the Army Corps of Engineers denied Dakota Access an easement to cross the Missouri River on Sunday, Dec. 4, 2016 near Cannon Ball.

Tribal leaders walk into the drum circle at the Oceti Sakowin Camp after the Army Corps of Engineers denied Dakota Access an easement to cross the Missouri River on Sunday, Dec. 4, 2016 near Cannon Ball.

Tribal leaders walk into the drum circle at the Oceti Sakowin Camp after the Army Corps of Engineers denied Dakota Access an easement to cross the Missouri River on Sunday, Dec. 4, 2016 near Cannon Ball.

Fireworks go off in the Oceti Sakowin Camp close to the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball. Today, the Army Corps of Engineers denied Dakota Access an easement to cross the Missouri River.

Fireworks go off in the Oceti Sakowin Camp close to the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball. Today, the Army Corps of Engineers denied Dakota Access an easement to cross the Missouri River.

Fireworks go off in the Oceti Sakowin Camp close to the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball. Today, the Army Corps of Engineers denied Dakota Access an easement to cross the Missouri River.

Fireworks go off in the Oceti Sakowin Camp close to the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball. Today, the Army Corps of Engineers denied Dakota Access an easement to cross the Missouri River.