Helmets adorn a memorial made by local residents to honor the 29 West Virginian coal miners that lost their lives on April 5, 2010 in the Upper Big Branch mining disaster, on Route 3 near Whitesville, West Virginia April 13, 2015. © Chris Tilley

When a coal mine disaster kills her brother, Betty, a pro-coal activist, joins forces with Lorelei, a tree-hugging environmentalist, to take on the most dangerous coal company in the United States. After seven years exploring the social, environmental and economic complexities in this underrepresented community, ‘Overburden’ premiered on the fifth anniversary of the Upper Big Branch Mine explosion, the largest mining disaster in over 40 years. In November 2014, former CEO of Massey Energy Don Blankenship was indicted on conspiracy charges for his involvement in the deaths of 29 coal miners - the first coal executive ever indicted on charges linked directly to the deaths of workers under his watch.

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