A leading conflict and armaments think-tank said on Monday that the global nuclear arsenal is expected to grow in the coming years for the first time since the Cold War.

Think tank says global nuclear arsenal to grow for first time since Cold War

Russia would only use nuclear weapons in the context of the Ukraine conflict if it were facing an "existential threat," said Kremlin spokesman Dmitry Peskov during an interaction with CNN International on Tuesday (March 22).

'Russia would use nuclear weapons if...': Moscow warns West over Ukraine invasion

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Think tank says global nuclear arsenal to grow for first time since Cold War

'Russia would use nuclear weapons if...': Moscow warns West over Ukraine invasion