How Did California’s Largest Chemical Spill Happen? | Massive Engineering Mistakes

In the town of Dunsmuir, California, a train derailment led to the states largest chemical spill, damaging the eco-system of the Sacramento River, but how did this happen? 🇬🇧 Catch full episodes of your favourite Quest shows on discovery+: https://bit.ly/3hMmzpZ Subscribe to Quest TV for more great clips:    / subscription_c.  . Follow Quest on Twitter:   / questtv                 Watch Quest on Freeview 17, Freely 18, SkyQ and Sky+ 140, Sky Glass & Stream 140, Sky Scotland 141, Sky ROI 140, Sky Glass & Stream ROI 145 , Virgin Media 128, Virgin Media Scotland 137.