Ukraine welcomed the first arrival this week of sophisticated tanks, as well as armed personnel carriers from the United Kingdom and the United States. They arrive on the battlefield just in time for a long-anticipated counteroffensive by Kyiv. As heavier military support begins to trickle in from western allies, Russian President Vladimir Putin weighs another political calculation of his own - if and when is the time to deploy tactical nuclear weapons. He set off alarms abroad when he announced in recent days that some nuclear weapons would be moved to Belarus. CNN's Clarissa Ward recently returned from Ukraine and sits down with One Decision to discuss these latest developments, her conversations with Ukrainian officials, and what Putin might be thinking of doing next. 
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