President Donald Trump shook hands with Kim Jong-un of North Korea on Tuesday and offered a major concession during the first summit meeting between their nations, a momentous step in an improbable courtship between the world’s largest nuclear power and the most reclusive one.
Brash, impulsive leaders who only a few months ago taunted each other across a nuclear abyss, Trump and Kim set aside their threats in a gamble that for now, at least, personal diplomacy can counteract decades of enmity and distrust.
Emerging from a day of talks in Singapore and speaking to reporters for more than an hour, Trump

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