Ukraine war: World must act now to stop Russia nuclear threat - Zelensky- PublishedUkraine's President Volodymyr Zelensky says Russian officials have begun to "prepare their society" for the possible use of nuclear weapons, but added he does not believe Russia is ready to use them.In recent weeks, the Ukrainian army has recaptured large swathes of territory in a successful counter-offensive that has forced Russian troops to abandon long-held positions.In what Kyiv describes as Moscow's response to its defeats, President Vladimir Putin has incorporated four partially occupied regions of Ukraine.Then, in Ukrainian, he said through a translator: "What we see is that Russia's people in power like life and thus I think the risk of using nuclear weapons is not that definite as some experts say, because they understand that there is no turning back after using it, not only the history of their country, but themselves as personalities."President Zelensky said Russian forces were putting up a "good enough fight", but that Ukraine had received weapons - "I won't say we have enough now" - and soldiers were motivated to push forward."