Response crews for the West Virginia train derailment continue to monitor the burning of the derailed rail cars near Mount Carbon next to the Kanawha River, Feb. 18, 2015. The West Virginia Train Derailment Unified Command continues to work with federal, state and local agencies on the response efforts for the train derailment that occurred near Mount Carbon, Feb. 15, 2015. (U.S. Coast Guard photo by Chief Petty Officer Angie Vallier)