The three key audio recordings of the tragedy — two exchanges between the driver of the Iryo train that was stopped on the tracks and the Atocha rail controller at the control center inside Atocha station in Madrid, and another one between the AVE driver coming up behind and the same controller — clearly show the mistakes that were made ahead of an accident that has killed at least 68 people and injured scores more. It is one of the biggest tragedies in European high-speed rail, and the second one in Spain in a year after 35 years of operation without a single fatal accident.

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