The Nord Stream pipeline sabotage, explained

European and NATO officials are blaming sabotage for three leaks in the Nord Stream 1 and 2 undersea pipelines running from Russia to Germany under the Baltic Sea. EU officials did not accuse anyone directly, but the allegation underscored the uncertainty around Europe’s energy standoff with Russia, and how volatile the continent’s energy security is as winter approaches.

Officials detected significant drops in pressure in the Nord Stream 2 pipeline on Monday, and then detected another pressure drop on the Nord Stream 1 pipeline, which were ultimately determined to come...