Since February 24, the date of the beginning of the Russian invasion of Ukraine, the head of Russian diplomacy and the master of the Kremlin have each brandished the threat of using atomic weapons, specifying that Russia had placed its forces nuclear deterrent on alert. Last Wednesday at 70e day of the war in Ukraine, Moscow announced that it had simulated “electronic launches” of nuclear-capable Iskander mobile ballistic missile systems. Empty rhetoric or serious threat? The weather wanted to know what the impact of a Russian nuclear attack on the capital, kyiv, would be.