CANNON BALL, N.D. — Currently, there’s a standoff in the Great Plains. Two-hundred Native American tribes are fighting the construction of an oil pipeline. North Dakota’s governor has called in the National Guard.

The clashes near Cannon Ball, North Dakota, have at times been rowdy and physical, with protesters pepper-sprayed and construction equipment damaged.

The estimated 5,000 Native Americans and environmentalists now encamped on federal and private land, say the pipeline was approved by the Army Corps of engineers without proper permits, and without consulting the tribe, ignoring the land’s historical and cultural significance.

Source: Stand-off in the Great Plains as Native Americans fight oil pipeline construction – CBS News