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Members of the Colorado River Tribes hold a banner to show their support for Native Americans of the Standing Rock reservation who oppose the construction of the Dakota Access Pipeline (DAPL), at the protest camp near Cannon Ball, North Dakota, on September 3, 2016. The Indian reservation in North Dakota is the site of the largest gathering of Native Americans in more than 100 years. Indigenous people from across the US are living in camps on the Standing Rock reservation as they protest the construction of the new oil pipeline which they fear will destroy their water supply. / AFP / Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

Members of the Colorado River Tribes hold a banner to show their support for Native Americans of the Standing Rock reservation who oppose the construction of the Dakota Access Pipeline (DAPL), at the protest camp near Cannon Ball, North Dakota, on September 3, 2016.
The Indian reservation in North Dakota is the site of the largest gathering of Native Americans in more than 100 years. Indigenous people from across the US are living in camps on the Standing Rock reservation as they protest the construction of the new oil pipeline which they fear will destroy their water supply.
 / AFP / Robyn BECK        (Photo credit should read ROBYN BECK/AFP/Getty Images)