Putin's Threats and Warnings Amid Russia's War in Ukraine

Russian missiles and mortar strikes hit Kharkiv, killing two people. Ukraine's counteroffensive is underway, but has not gained momentum yet. Russian shelling has hit Kherson and other parts of Ukraine, causing two deaths and 25 injuries. Russian President Vladimir Putin warns NATO over being drawn into the Ukraine war and says Russia has more nuclear weapons. Ukrainian President Volodymyr Zelensky rules out peace negotiations with Russia during African leaders' visit to Kyiv. US President Joe Biden is open to dropping a hurdle for Ukraine to join NATO.