4/24/2012 1:20 PM

On April 24, the USDA announced the nation's fourth case of bovine spongiform encephalopathy (BSE), sometimes called mad cow disease, in a dairy cow from central California. Dr. John Clifford, USDA's chief veterinary officer, answers a series of questions about this BSE case.

Is the EPA being unrealistic in its timeline to reduce farm runoff into the Chesapeake Bay?

  • Yes
  • No
  • Unsure

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11/27/2014 | Last Updated: 5:30 AM