US President Donald Trump’s summits with North Korean leader Kim Jong-un in Singapore and Russian President Vladimir Putin in Helsinki are history, as is the G7 summit in Quebec and the NATO summit in Brussels. But already there is talk of another Trump-Putin summit in Washington, DC, sometime later this year. Some 30 years after the end of the Cold War, a four-decade era often punctuated by high-stakes, high-level encounters between American presidents and their Soviet counterparts, summits are back in fashion.

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