Russia’s increased nuclear threats: how will NATO respond?

Days after launching his invasion of Ukraine, Russian President Vladimir Putin put his strategic nuclear arsenal on high alert — a warning to the west not to interfere. However, analysts believe the risk of an all-out nuclear war is low.  Instead, Putin might be tempted to use tactical nuclear weapons in Ukraine – smaller weapons designed to cause more limited devastation.  How likely is that – and how would the west respond?

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