HARLOW: All right, a new report says a group of North Korean hackers is actively targeting U.S. businesses and critical infrastructure right now.</s>SCIUTTO: The cyber security firm McAfee says that the hackers have also tried to infiltrate businesses around the world in critical sectors such as energy and defense. And hacking continued while President Trump was meeting with Kim Jong-un in Vietnam last week in a sensitive nuclear negotiations. Let's discuss now with David Sanger; he's national security correspondent for the "New York Times", also author of "The Perfect Weapon" which dives into the battles in cyberspace. David, good to have you on here. We know North Korea has attacked the U.S. in cyberspace for years now, I mean, perhaps most famously the Sony hack. Is it surprising and is it worrisome that, that hacking continued -- it might have even reached an inflection point during these Trump-Kim negotiations?</s>DAVID SANGER, NATIONAL SECURITY CORRESPONDENT, NEW YORK TIMES: You know, Jim, I don't think it's at all surprising. In fact, the two are really deeply related. It's pretty clear at this point that Kim Jong- un has calculated that he needs to keep this freeze on missile tests and on nuclear tests going even while he's producing more nuclear material. But he's got to show that he can continue to exercise some degree of influence and power and the power of disruption. And so cyber is the natural way for him to turn. And this is not just true for him, it's true of course for the Russians, the Iranians in a different form for the Chinese.
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