As I said the other day here. They are making it clear to Putin that he cannot win. If it defeats Ukraine, then it loses with severe sanctions, if it accepts Donbass and neutrality, in addition to being that Russia failed to invade Ukraine, most sanctions would continue, two defeats. He cannot accept defeat, because it would be the end of him in office and he would be eliminated soon after. So he starts to think, I restore the fear about military power and I get a negotiation with the West that alleviates part of the sanctions, leaving only sanctions in areas of the Russian military and political sector, but freeing the rest of the economy. I can't win, but I can't lose. So I have to tie the game, there's only one way to tie the game. Use a tactical nuclear weapon and talk, great power negotiation or nuclear winter. I'm just seeing this way out for him.