against it. this is a very prudent measure on the part of the united states to posture itself much more -- not aggressively, but in a much more probably fulsome way in order to handle all types of contingencies that might be coming out of the north. >> general, the u.s. doesn't have actual assets on the ground in north korea, presumably satellite. how do we kw what north korea is up to? >> very difficult. we have great technical, are you exactly correct, brooke. we have great technical collection against north korea the only way we can penetrate north korea, we do that by way of interrogations that take place routinely from refugees that leave north korea, routinely coming through china and other means of getting out of the kingdom up north. so we are able to get insight. we also have periodic visits. you spoke to governor richardson