More than a year after a major train derailment, video has emerged showing how two hazmat techs were almost killed. Twenty-six rail cars went off the tracks — a number of them filled with toxic or flammable chemicals — and some of them exploded and burned. Hours later, most of the fire had been extinguished. Members of a hazardous materials crew were using road flares to burn off flammable materials, tossing one flare from a distance toward one of the derailed cars. The video recorded what happened next… A large fireball expanded out of the site and appeared to engulf two HAZMAT Techs, who had been brought in by the railroad. Because of their turn-out gear, the two HAZMAT Techs were able to walk away without injury.