dr. brawley, big shoes to fill, but you are doing it. we all know that the credo that you all take is to do no harm, and yet you write a book on how we do harm. that is the kind of thing that can get you into some trouble. >> yes, yes. the reason i did it was during the health-care reform debate, there was some talk about how we had the best health care system in the world if it is true if you can afford it and know how to get through it, but as i look back over a number of my patients, and the book is stories about my patients and how the health-care system actually occur to them. there is over treatment, people getting too much treatment. there is under treatment, people who need treatment and cannot get it. unfortunately, medicine is a big business, so there are people selling things, and under the guise of health information, they are actually advertisements with all of the things you get with advertisements, including a corruption of the truth. in here -- tavis: i am asking you how, not what, but how did it become such a big busines

dr. brawley attributes it to campaigns against higher taxes during a weaker economy. >> excises on tobacco are especially effective in preventing 14 and 15-year-old kids from buying cigarettes. >> reporter: other suggestions include smoke-free laws and tobacco prevention programs. >> at 12 i smoke mid first cigarette. >> reporter: the government hopes to get teens attention in this new public service announcement. >> at 50 i'll die of a heart attack. >> reporter: big tobacco is criticized in the surgeon general's report for spending more than $27 million a day in marketing and promotions. altria, parent company of philip morris usa says it markets to adults only. erica edwards, nbc news. >>> the metro apparently knew for six years that some of its railcars had brake problems. that revelation surfaced today at a board meeting about metro safety. according to the "washington post," the transit agency knew that brake parts designed to last 35 years were failing after 10 or 15 years. but the agency didn't have money to fix the problem. in two recent cases, brake parts fell off of trains. there

dr. otis brawley. that is next time. we will see you then. >> every community has a martin luther king boulevard. it's the cornerstone we all know. it's not just a street or boulevard, but a place where walmart stands together with your community to make every day better. >> and by contributions to your pbs station from viewers like you. thank you. >> be more. >> be more.