Associated Press
A cow stands behind a fence in DeWitt, Neb., Wednesday, April 25, 2012. The beef industry responded swiftly after the first new case of mad cow disease was found in the U.S. since 2006. With billions of dollars at risk, the USDA and other government officials quickly explained that consumers were never at risk because none of the animal’s meat was bound for the food supply. (AP Photo/Nati Harnik)

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