Charred tanker cars from the train crash scene remain in Lac-Megantic, Que., Friday, July 12, 2013. Transportation workers moved carefully Friday in and around the site of the nearly we

 

              Charred tanker cars from the train crash scene remain in Lac-Megantic, Que., Friday, July 12, 2013. Transportation workers moved carefully Friday in and around the site of the nearly we
Charred tanker cars from the train crash scene remain in Lac-Megantic, Que., Friday, July 12, 2013. Transportation workers moved carefully Friday in and around the site of the nearly week-old derailment that incinerated the heart of this small Quebec town and killed 50 people, searching for evidence that would help explain what led to such massive destruction. (AP Photo/The Canadian Press, Jacques Boissinot)