Breach on the High Iron

At precisely three-fifty in the morning, the heavy diesel locomotive rumbled along Track 7 of the Calumet rail yard. Its colossal steel wheels ground against the frost-covered iron rails, spitting orange sparks into the freezing darkness as the engine steadily built momentum toward the mainline junction switch. Behind the locomotive sat three black tanker cars, their painted hazardous chemical placards concealing enough volatile military munitions to level five city blocks.…