>> they need to work on accuracy and targeting. so there are other steps to come. it means they're on a very fast track and this is an estimate, an analysis based on what they think in the intelligence community has been achieved. we know there have been errors in the past? >> reporter: you are absolutely right. one important piece of information we don't know is what is their confidence level in this assessment? is it low? is it medium? is it high? we all know north korea is one of the highest intelligence targets. you are right. this is an estimate. this isn't proof as mike hayden the former...