is showing signs of trying to deceive the u.s. and other world countries who are watching for denuclearization. in fact, the exact opposite may be happening according to their report. now, nsa or national security adviser, john bolton says don't get too caught up. don't worry about this. should we be concerned? >> i think so, not only because this has implications for other negotiations around the world. as you mentioned, right now it's advantage north korea. the reports are showing that they haven't just not frozen their program. they're enhancing their production capabilities, and they're trying to conceal activities at multiple secret production sites. they have only said that they have one site, so they're lying to us, which is nothing new. and they're getting away with it. we haven't heard any statement from president trump saying something's going on. let's put a stop to it. at the same time, north korea hasn't even returned the prisoner of war remains that they said they were going to return. they're asking china for sanctions relief, so they want a reward for bad behavior. and we've given something up. we stopped these joint military