Could Russia deploy chemical weapons in Ukraine, and if so, how would the West react

In a news conference on Thursday, Joe Biden was asked twice if Nato would respond with military force if Russia used chemical weapons in Ukraine, a concern highlighted frequently in recent weeks by the US, UK, and others.

Russia is one of 193 nations that have signed an international convention prohibiting the development, storage, and use of chemical weapons — and Moscow denies possessing or employing such weapons.

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