Each day, as Saxton returned to the disaster zone, he passed a Roman Catholic church. "We never came and went when there wasn't a funeral going on," he said.

In the wake of this and other recent accidents as energy production soars in North America, Canadian and U.S. regulators are proposing new safety rules for tank cars that carry oil, ethanol, and other flammable liquids. Saxton and Greenbrier have pushed for swift changes, but others in the industry are asking for more time to retrofit cars like the type that exploded at Lac-Mégantic. (See related stories: "Oil Train Derails in Lynchburg, Virginia" and "North Dakota Oil Train Fire Spotlights Risks of Transporting Crude")

"If you don't set an aggressive time