Does offering incentives like money or candy motivate kids to perform better in school? Is the new Illinois cigarette tax really helping to deter people from smoking? Today on Focus, we'll talk about what influences behavior....and what doesn't. Join our conversation on Facebook and Twitter.

Guest: Allan M. Brandt.

Few products have been as heavily promoted or as deeply entrenched in the American consciousness as the cigarette. The tobacco industry has long operated under one goal: casting doubt on the potential harm of smoking. Today on Focus, we'll explore the 50-year effort to mislead a country with Allan M. Brandt, author of The Cigarette Century.