Members of the National Transportation Safety Board enter the offices of Montreal, Maine & Atlantic Railway in the town of Farnham, Quebec, Thursday, July 11, 2013. An unmanned, Rail Wo

 

              Members of the National Transportation Safety Board enter the offices of Montreal, Maine & Atlantic Railway in the town of Farnham, Quebec, Thursday, July 11, 2013. An unmanned, Rail Wo
Members of the National Transportation Safety Board enter the offices of Montreal, Maine & Atlantic Railway in the town of Farnham, Quebec, Thursday, July 11, 2013. An unmanned, Rail World-owned Montreal, Maine & Atlantic Railway train broke loose early Saturday before jumping the tracks in Lac-Megantic, near the Maine border, investigators said. All but one of the 73 cars were carrying oil. At least five exploded. (AP Photo/The Canadian Press, Graham Hughes)