the current example is the kid who takes arks to gorton -- who takes oxycoton, that is the most popular among the teenagers, he crushes it and get high. in places like long island where kids can not get it any longer because it is too expensive, by and large, they switched to hear when to get a similar kind of high. the only other point i would make is -- this chart is not up there, but we ask kids in the survey -- host: do you want me to show this one? guest: yes. host: go ahead, you can talk about it while we show this. guest: kids who have never smoked a nicotine cigarette, only 5% who had never smoked a cigarette tried marijuana, compared to 61% of kids to smoke nicotine cigarettes, they had tried marijuana. there are a couple of reasons for that. use to a mailingi that stuff, but the other is this thing i just mentioned about the dopamine levels. there is a relationship behind it and i just want to be the science behind that. host: joseph califano, thanks for being here. we will take a short break and come right back with our financial regulatio series here on "washington journal."