concerning is that this particular hack does bear some very stark similarities to what happened to sony and what happened to the south korean banks last year. someone managing to break in, grab the keys and wander inside protected information space, rosemary. >> yeah. it is a warning to everyone across the globe. of course cyber security is the new norm, isn't it. while we're on the topic, i do want to move to what happened in north korea. its internet outage lasted nine hours as we mentioned. what do we know about what caused that outage? >> reporter: well, we know that it went down. and the website that went down went down hard. these are government websites, and when we try to check in to kcna, which is the way that north korea speaks to the outside world, we got an error page. this is something i've never seen before. people who watch north korea have never seen this before.