Ukrainian troops have been making big advances in their counteroffensive against Russian forces. Insider spoke with two professors about how Russian President Vladimir Putin may react. Ukrainian troops told The Telegraph over the weekend that Russian forces had been fleeing the area and that Ukrainian forces were overwhelmed by the amount of weaponry and ammunition they'd abandoned. Possible use of chemical or nuclear weaponsMasala said the use of chemical or nuclear weapons by Russia was "always a theoretical option" but "very unlikely." "I think the use of nuclear weapons is out of the question at the moment," he said.

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