All eyes will be on Singapore this week -- as President Donald Trump and North Korea leader Kim Jong-Un meet for the highly anticipated summit. Here's CBS News National Security Correspondent David Martin with a preview of what to expect. Lesley Stahl will introduce us to Brad Parscale -- who played a key role in the president's election. He is known only as JR -- an artist whose work is displayed around the world. Anderson Cooper has his story on tonight's "60 Minutes." Learn more about your ad choices. Visit megaphone.fm/adchoices

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