How to talk to your teens about health, obesity

About one in three American kids and teenagers are overweight or obese, and childhood obesity is now the number one health concern among parents in the United States, topping drug abuse and smoking.

Research from a new study in the journal Pediatrics suggests that doctors are missing important chances to stem unhealthy behavior in overweight teens before they fall into the obese category.

Today on American Morning, Chris Powell, the host of ABC's "Extreme Makeover Weight Loss Edition," joins Kiran Chetry and Ali Velshi to talk about how parents can have conversations with their kids about healthy lifestyles and how they can get their doctors involved as well.