Ukraine’s President Volodymyr Zelenskiy addresses the Australian parliament via videolink, as Russia’s attack on Ukraine continues, in Kyiv, Ukraine March 31, 2022. Ukrainian Presidential Press Service/Handout via REUTERS ATTENTION EDITORS – THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.The President of Ukraine, Volodymyr Zelensky, warned on Thursday that the increased threat of a nuclear attack by war in his country puts global security at risk, he said in a virtual speech to the Australian Parliament.