A train hurtled around a corner at 82 mph, eventually coming off the rails and killing four passengers.
Decades earlier, faulty decision-making resulted in the deaths of the seven-person crew of the Space Shuttle Challenger.
Years before these events, a stuck valve regulating the supply of coolant to a nuclear reactor nearly resulted in the meltdown of a nuclear plant in Pennsylvania. In each of these cases, poor or inadequate sleep was one of the factors that contributed to the failure.
