Too often, accident investigations blame a failure only on the last step in a complex process, when a more comprehensive understanding of that process could reveal that earlier steps might be equally or even more culpable.

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The accident and Edward Kennedy's failure to notify authorities of it for several hours helped stymie the senator's presidential ambitions.

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That's like saying that just because there are police officers around and that an accident happens, there is a failure on the part of the police officers.

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The families' requests for a public inquiry were initially refused, but a Marine Accident Investigation Board inquiry blamed the failure of lookouts on both vessels for the disaster.

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Schettino's first officer, Ciro Ambrosio, and six other officers both on the ship and from the firm Costa in Genova are under investigation over allegations including manslaughter, shipwreck and failure to report the accident, the prosecutor said.

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Schettino's first officer, Ciro Ambrosio, and six other officers both on the ship and from the firm Costa in Genoa are under investigation over allegations including manslaughter, shipwreck and failure to report the accident, the prosecutor said.

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Schettino's first officer, Ciro Ambrosio, and six other officers both on the ship and from the firm Costa in Genoa are under investigation over allegations including manslaughter, shipwreck and failure to report the accident, the prosecutor in the case has said.

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Note: We changed this story on 15th February 2013 to reflect the fact that the accident was caused by structural rather than mechanical failure.

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While Moscow said the failure to notify Ashgabat was an accident, Russia simply did not need the gas as European demand was down significantly due to the financial crisis and a relatively warm winter.

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