Demonstrators chant and hold signs behind a display of coal ash and the chemicals in it during a protest near Duke Energy's headquarters in Charlotte, N.C., Thursday, Feb. 6, 2014 over Duke Energy's ... more 
Demonstrators chant and hold signs behind a display of coal ash and the chemicals in it during a protest near Duke Energy's headquarters in Charlotte, N.C., Thursday, Feb. 6, 2014 over Duke Energy's coal plants. (AP Photo/Chuck Burton) less 
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Associated Press | Photo By AP Photo/Chuck Burton
Thu, Feb 13, 2014 6:00 PM EST