NEW: U.S. intelligence says the North Koreans have begun pulling cables from the tunnels at their nuclear test site — a “first step toward closing them down,” CBS News’ David Martin reports

NEW: U.S. intelligence says the North Koreans have begun pulling cables from the tunnels at their nuclear test site — a "first step toward closing them down," CBS News' David Martin reports https://t.co/i5P0kInYZS pic.twitter.com/7FLEAWJLcB

— CBS News (@CBSNews) May 2, 2018

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