- In the first of a series of nuclear warning launched by Russia; We have a prominent Russian foreign policy strategist warning that Moscow will 'go nuclear' and leave 'little left' of some European countries if they continue backing Ukraine. Sergei Karaganov said Russia would initially use conventional weapons, but would resort to nuclear attacks if Europe refused to surrender. The honorary chairman of Russia's Council for Foreign and Defense Policy also dismissed the prospect of Britain or the United States retaliating with nuclear weapons. His threats come as Moscow demands European countries cut the military and financial support helping Kyiv resist Russia's full-scale invasion. 'If they continue this war, a European war with American help, against Russia, on Ukrainian territory, sooner or later we'll feel the need to escalate,' Karaganov told the BBC. 'According to my scenarios, the first series of blows will be conventional. But if Europe does not surrender, unfortunately, we will have to go nuclear. There will be little left of some European countries.' Challenged over the prospect of a European response that would leave nothing of Russia, he insisted there would be no retaliation. 'No, there will be no response from Europe,' he said. 'What, Britain will attack Russia with nuclear weapons? I hope you're not that crazy. I'm sure the Americans are not that crazy.' In the second event, Russia sent a document to NATO warning the alliance that Moscow could use nuclear weapons in response to an attempt to isolate the Russian exclave Kaliningrad. Reuters reported viewing the document on Wednesday. “Russia will be ready to use the entire arsenal of forces and capabilities at its disposal, including nuclear weapons, in order to defend ​its territory should NATO countries undertake any attempt aimed at isolating the Kaliningrad Region from the rest of the country,” the document explains. It continued, “The document also raised the possibility of Russi