Why airliners in Cuba and Iran crash so much

WHEN the dream of a smooth flight turns into the nightmare of an airliner crash, understanding what went wrong is sometimes straightforward. That was the case with a Malaysia Airlines flight which crashed in the summer of 2014, killing 298. This week Dutch and Australian investigators conclusively showed that it was shot down by a missile fired by Russian armed forces. But in other cases it is much harder to apportion blame. Such is the complexity of civil aviation that air-crash investigators spend years sifting through wreckage, recordings and data…

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