In Canada, authorities believe as many as 50 people may be dead after a train derailment.

They say some of those that died may have been "vaporized". Edward Burkhardt, CEO of Montreal, Maine & Atlantic Railways Inc., spoke on Thursday, responding to the anger and criticism directed at him.

Railway chairman: People in Canadian city 'wanted to throw stones at me'

"I'd been told about it. I'd been warned about it," he said. "But it was worse than I thought. I thought people would respond to my willingness to come there. I mean, they were screaming about how I took three days to get there," Burkhardt said.

Our Anna Coren spoke to the head of the railway company and is OutFront.