Three Mile Island
"The 3 Mile Island incident report was required reading."
John Kemeny was the chief investigator for this incident and he wrote a piece in the Dartmouth Magazine about it. He went into the investigation that the operators were covering up mistakes etc. On testimony, one of the operators stated that they were never trained on the particular scenario on the simulator.
Kemeny immediately requested access to the simulator and found that the scenario could not be simulated on the simulator. So the operators could not possibly have been trained for the incident as the simulator could not simulate it.
Biting the hand that feeds IT
