one of the notable things where you see something like vip housing, some observable, often what they've done is buried something so deep you cannot see what is going on. >> reporter: analysts say the u.s. does get valuable help from south korean intelligence, but are america's decision makers making choices without a full picture? >> i think the decision makers may not have the full information but they do understand how to look at history and figure out by extrapolation what's probably going to happen. >> reporter: analysts say u.s. and allied intelligence agencies often have to recruit north korean defectors to get the best information. people like diplomats. but even they come with baggage. some might give misinformation in order to get money or protection. some might be double agents for the north koreans. and others could have criminal backgrounds because they deal in money and drug trafficking and they might be unreliable because of that. wolf? >> brian, in recent months it seems at least that the director of national intelligence, dan coates, and the new cia director mike pompeo, they were giving