BROWN: Well, breaking news. The president has just signed an executive order slapping North Korea with new sanctions and tightening the economic screws on North Korean leader Kim Jong-un, hoping he'll stop his development of nuclear warheads and the missiles to deliver them. This comes as the world is still reckoning with President Trump's threat to totally destroy North Korea. Trump's words rattled many, but not, it seems, North Korea's foreign minister. Back home, we have a saying, the dog barks but the caravan continues. If he was thinking he could scare us with the sound of a dog barking, that's really a dog dream. Joining me now, Matthew Rosenberg, CNN national security analyst and national security correspondent for "The New York Times." So, Matthew, what do we know about these sanctions?</s>MATTHEW ROSENBERG, CNN NATIONAL SECURITY ANALYST: The sanctions try to target a kind of broad section of the North Korean economy from manufacturing information, technology, I think textiles are there. The Trump administration is going to be briefing in about 20 or 30 minutes for a more full picture of it. But it also looks at banks and banks outside North Korea that are doing any business with North Korea. And it really is an attempt to choke off North Korea's economy and say, look, if you're going to keep pushing on this, there are ways to punish you short of what Trump's promise, which is destruction. You know, I think at this point anything that sees an attempt to peacefully resolve this problem or this issue is probably welcome news to most people in the world and certainly people in the region. I think, you know, there's the issue of how far can you push North Korea. You don't want to collapse its economy. South Korea's made very clear Japan, China, around there do not want to see a state collapse there. And if you're going to really aggressively try and knock out its economy, you're risking a lot more disorder and a lot more, you know, problems that aren't necessarily easy
Interview with National Security Adviser Lt. General H.R. McMaster.