dr. pamela ling, her recent study of e-cigarettes. >> i finally found a smarter alternative for cigarettes>> putting smoking in the movies, having celebrity endorsements, and doctor endorsements, which you're seeing once again. >> as diseefn as stephen dorf told us: >> i've just found a smarter alternatives. blue e-cigs. >> it's vapor not smoke. >> i don't think that anyone really wants to addict like a whole new generation to nicotine but a lot of things from the advertising that appeals to youth could potentially do that . >> electronic cigarettes have been presented as smoking cessation agents for people who are trying to quit smoking. but now that these devices have gone mainstream they've got the attention of doctors and scientists. associated with more conventional cigarette use in teens. what we found is ha that the tes who used grealt e-cigarettes were more likely tobacco cigarette smokers. we were surprised by the magnitude of the smoking. >> were you finding one or the other use or dual use? >> high levels of dual use. common in adolescence when there there was a lot of experimen