dr. timothy johnson, abc news, washington. >> our "a closer look" for tonight. >>> and when we come back, big changes in the new list of america's richest people. my parents all smoked. my grandparents smoked. i've been a long-time smoker. you know, discouragement is a big thing in quitting smoking. i'm a guy who had given up quitting. what caused me to be interested was, chantix is not a nicotine product and that intrigued me. the doctor said while you're taking it you can continue to smoke during the first week. (announcer) chantix is proven to reduce the urge to smoke. in studies, 44% of chantix users were quit during weeks 9 to 12 of treatment, compared to 18% on sugar pill. today i see myself as a jolly old man, (laughing) who doesn't have to smoke. ...who doesn't have to sneak out to take a couple puffs of a cigarette anymore. (announcer) herb quit smoking with chantix and support. talk to your doctor about chantix and a support plan that's right for you. some people have had changes in behavior, hostility, agitation, depressed mood and suicidal thoughts or actions while taking or a