bridge was coming down. so on a day when we were honoring a moon who put a premium on peace, dr. martin luther king jr., protests broke out from coast to coast. in san mateo, california 68 people were arrested for blocking traffic on a bridge for hours. there are also demonstrations in new york st. louis, boston and atlanta. where luns blocked a parade near the annual martin luther king jr. birthday commemoration. bad news for us, sitting may be the new smoking. according to a new study, sitting for prolonged periods of time can increase your risk of heart disease, diabetes even if you exercise. >> get up. >> the risks appear to be greatest for people who are sedentary eight or nine hours a day and more pronounced for people without regular exercise. >> at least we exercise regularly. >> we do? >> but it doesn't help.