Lac-Megantic: The Runaway Ghost Train and the Swiss Cheese Disaster

On a warm summer night in July 2013, patrons on a bar terrace in Lac-Megantic, Quebec looked up to see a 10,000-ton freight train screaming around a curve with no lights, no driver, and no horn. What followed killed 47 people and became the deadliest non-passenger rail accident in Canadian history.This episode is a master class in the Swiss cheese model of disaster, showing how aggressive cost-cutting dismantled every safety net until all the holes lined up. We trace the full mechanical and human chain that turned volatile crude oil into a tsunami of fire.How a cheap epoxy engine repair from eight months earlier started the fire that doomed the trainWhy volatile Bakken crude in thin-walled DOT-111 tank cars amounted to liquid dynamite on deteriorating tracksThe fatal air-brake physics: shutting off the engine to fight the fire killed the compressor and released the brakesWhy seven handbrakes were set when 17 to 26 were needed, and how single-person crews removed the last safety netThe 18 contributing factors investigators found, and why a jury acquitted the three frontline workers