Crude oil begins to flow through controversial Dakota Access Pipeline

The controversial Dakota Access Pipeline progresses Story and Polk counties in central Iowa on Sept. 13, 2016. (Creative Commons photo by Carl Wycoff)
Crude oil is now flowing through the Dakota Access Pipeline, despite months of protests against it by Native American tribes and environmental groups.
The pipeline spans more than a thousand miles from North Dakota to Illinois, and cost some $3.8 billion to construct. It is expected to transport approximately 520,000 barrels of oil daily.
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