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Published on Apr 24, 2012
See the full episode at http://video.pbs.org/video/2226356267/ Did you know coal supplies nearly half of America's electricity? Visit Black Thunder Mine with Yul Kwon and discover how we mine this pivotal material. See more in the four-part AMERICA REVEALED, Wednesdays, April 11- May 2 at 10/9c on PBS.