Here's the background: a TVA-run coal-fired power plant in the eatern Tennessee town of Kingston was depositing their coal ash waste into a giant retaining lake. The earthen dam holding it together gave way, and the sludge poured out (more than a billion gallons of it), covering an immense swath of land (and draining into the Emory and Tennessee rivers). The sludge contains mercury, lead, and arsenic. But the EPA says there's nothing to worry about. The locals are at no risk. And their drinking water is fine. And the Tennessee Valley Authority is arresting people taking pictures of the site.
I just love that clean coal technology!