A broken rail joint has emerged as the likely cause of Spain's deadliest train crash in over a decade, with investigators now facing uncomfortable questions about warnings that went ignored for months.
Technicians examining the track near Adamuz in Cordoba province found visible wear on the connection between rail sections, a component called a fishplate that they believe had been deteriorating long before Sunday's disaster, according to Reuters. The damage created a gap that grew wider with every passing train.
