vulnerabilities in which the russians were able to preemptively destroy u.s. nuclear weapons. so the two sides have kind of switch uses in this regard. the russians look remarkably like historians. you know, public constituencies and russia are not worried about missile defense, that finding a useful political bargaining chance on the table. i think there is a belief -- i think russia has been much greater belief in the u.s. technical skills and technical ability than the u.s. has in its own type of skills and ability. so i don't have a single clean and fair, but i think there's a series of overlapping different issues. ..