This is one of the most shocking acts of sabotage since World War II. On the night of 26 September 2022, three of the four North Stream 1 and Nord Stream 2 pipelines exploded at the bottom of the Baltic Sea, releasing about 465,000 metric tons of methane into the atmosphere. The attack put an end to a strategic energy link between Russia and Germany. Four years later, our correspondents Anne Maillet and Nick Holdsworth go through the consequences that still persist.

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