Photos: Unity preached at Oceti Sakowin Camp, pipeline protest

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

Veterans walk down flag row in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Demonstrators celebrate after the Army Corps of Engineers denied Dakota Access an easement to cross the Missouri River on Sunday, Dec. 4, 2016 near Cannon Ball.

Demonstrators celebrate after the Army Corps of Engineers denied Dakota Access an easement to cross the Missouri River on Sunday, Dec. 4, 2016 near Cannon Ball.

Standing Rock Sioux Tribal Council Chairman, Dave Archambault II greets demonstrators as they celebrate 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.

Demonstrators chant around 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 gather around 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 gather around 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.

Native's play in a 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.

Demonstrators walk the hills above 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.

The Oceti Sakowin Camp by the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

The Oceti Sakowin Camp by the Standing Rock Reservation on Sunday, Dec. 4, 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.

Demonstrators gather at the Cannonball River during the morning prayer in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 in Cannon Ball.

Feather Sherman of Montana 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.

Demonstrators gather at the Cannonball River during the morning prayer in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 in Cannon Ball.

Demonstrators gather at the Cannonball River during the morning prayer in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 in Cannon Ball.

Demonstrators gather at the Cannonball River during the morning prayer in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 in Cannon Ball.

Ariel Wolansky, left, and Ashley Seday, right, both of Auburn, CA, embrace as they gather at the Cannonball River during the morning prayer in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 in Cannon Ball.

Food donations sit ready to be taken in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Professor and speaker Cornel West waits to speak during an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

People gather to listen as Tribal and Religious leaders speak during an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Tribal and Religious leaders speak during an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Cornel West speaks during an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Cornel West speaks during an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

A group of native veterans arrive to an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Tribal and Religious leaders speak during an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Cornel West listens during an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Tribal and Religious leaders speak during an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Tribal and Religious leaders speak during an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Native veterans listen as other speak at an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Tribal and Religious leaders speak during an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Tribal and Religious leaders speak during an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

People gather as tribal and religious leaders speak during an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Riders on horseback gather as people speak during an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Mark Kruse of Duluth, MN helps load a truck with donations in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball. The donation tent where the items had been stored needs to be converted to housing so the donations had to be moved.

Tribal leaders gather around the Sacred Fire in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Chief Arvol Looking Horse listens as Cornel West speaks during an interfaith prayer circle in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Chief Arvol Looking Horse, left, and Cornel West, right, listen 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.

A native singer plays for a crowd 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.

Demonstrators gather to talk over issues, both within the camp and outside of it in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.

Demonstrators gather to talk over issues, both within the camp and outside of it in the Oceti Sakowin Camp near the Standing Rock Reservation on Sunday, Dec. 4, 2016 near Cannon Ball.