Cattle graze in a field near Sacramento, Calif. California Gov. Jerry Brown, along with many health advocacy groups, has called the overuse of antibiotics "an urgent public health problem."
Regulators say R.J. Reynolds Tobacco Co. must stop selling four kinds of cigarettes because the Food and Drug Administration said the company had failed to show they aren't riskier than cigarettes on the market before mid-February 2007.
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Dr. Frances O. Kelsey of the U.S. FDA, who is credited with keeping the birth-deforming drug, Thalidomide, off the U.S. market, is shown in an Aug. 1962 photo. Kelsey died on Friday at age 101.