In North Dakota hundreds of indigenous activists have shut down construction on a multibillion-dollar pipeline project. The $3.8 billion Dakota Access pipeline is slated to carry half a million barrels of Bakken crude from North Dakota to Illinois. But members of the Standing Rock Sioux Tribe say the pipeline threatens to contaminate the Missouri River, which provides water not only for thousands of residents on the reservation, but also for millions of people living downstream. On April 1, members of the Standing Rock Sioux Tribe launched an ongoing protest camp called Sacred Stone. Since late July, when the U.S. Army Corps of Engineers approved the pipeline, at least 28 people have been arrested as they have used their bodies and horses to block construction.