Ukraine president Volodymyr Zelensky and Russian envoy to the UN engaged in a war of words on Wednesday at the United Nations Security Council which had convened a meeting to discuss the situation in war-torn Ukraine. Zelensky lashed Russia for its invasion of Ukraine and warned the world of a radiation catastrophe at Europe's largest nuclear plant currently under Russian control in Ukraine. The Russian envoy hit back at the Ukraine president and defended his country's military operation against Kyiv. Watch the video for more.