Investigation showed tankers were carrying more volatile fuel than labeling showed . Development explains why fuel ignited so quickly in a derailment in Lac - Blanc . Disaster claimed 47 lives as fuel ignited and leveled the area .
Investigation finds tankers were carrying more volatile fuel than labeling showed . Development explains why fuel ignited so quickly in July derailment in Lac-Megnatic . Disaster claimed 47 lives as tankers exploded and leveled downtown area .