Study Finds Half of U.S. Adults at Risk for Health Problems Relates to Elevated Blood Sugar

One out of three Americans over 20 is pre-diabetic and another 29 million already have diabetes. According to a recent report, the risk for some cancers is 15 percent higher for someone with higher-than-normal blood sugar. Gwen Ifill speaks with Dr. David Nathan, director of the Diabetes Center at Massachusetts General Hospital, about how to prevent high blood sugar levels.