Between them, the US and Russia have 90 per cent of the world’s nuclear firepower.
But today, the New START Treaty, which limits the number of missiles and warheads in their arsenals, expires.
Russian President Vladimir Putin first suspended it two years ago. Now, without a last-minute deal, it looks set to collapse for good amid fears of a new nuclear arms race.
Today, a view from the inside as we speak with Paul Dean – who helped implement the treaty and is now a vice-president for the US-based Nuclear Threat Initiative – on the threat of nuclear war.
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