need to test and have developed a level of expertise that doesn't require testing. some of that meant for the domestic population. the other issue, too, is going forward with a big summit. victor shaw, who would have been very involved in these negotiations, he has said that a danger for summits like these is the danger of inflated expectations. you go there now with enormous expectations about what each side is going to give each other and what you're going to walk away with. that said, this is not a place we expected to be even a few weeks ago. it is remarkable progress. >> it does -- it is very significant. indeed, we have been showing -- brian todd has been covering north korea for a long time, as well as the images we have been seeing of the latest major ballistic missile test was last november. it's been several months that the north korea have been silent, at least in this area of