Meth Ads News Today

>> i did meth. and now this is my life. >> reporter: these harrowing meth ads helped drop teenage meth use in montana by 50%. sam prestige is a georgia teenager. >> i knew i was overweight. >> i could see how unhappy he was at school. >> i started being teased a lot. >> reporter: he said he is trying to eat better, change his life and avoid becoming a statistic in a commercial. steve osunsami, abc news. >> very important issue and polarizing one as you can see for clear reasons there. a lot of f...