on winning back gop control of the senate and holding on to the house. the u.s. supreme court taking on the toughest immigration laws. the justices hearing arguments on arizona senate bill 1070. the key question, who has the power. january brewer signed the bill into law two years ago. the obama administration sued arizona arguing that the federal government, not the state has the power to enforce emigration laws. we ll have a live report in 22 minutes. just across the street, a secret service sex scandal. nine secret service members forced out of their jobs after the encounter with prostitutes in colombia. lawmakers are just getting started. they are talking homeland security now with janet napolitano. she says she will not fire the secret service director. she did tell him what she exp t expects of him now. there are three things i immediately discussed with the director. one was to make sure the president s security was never at risk. two, make sure we instituted a p
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it is deadly. the u.s. agriculture department announced that a case of mad cow disease has been confirmed confirmed in a dairy cow out in central california. let s bring in lisa sylvester. she s working this story for us. lisa, what is the department of agriculture saying. what s going on? reporter: wolf, the usda just released information within the last hour and what we know is that it is a dairy cow from central california that has tested positive for bse or commonly known or referred to as mad cow disease, and wolf, this is only the fourth case ever detected in the united states. normally an animal contracts bse from consuming contaminated feed and this cow tested positive from atypical bse, it s a rare form of the disease and not generally associated with an animal-consuming infected feed and it states, quote, the cow was never presented for slaughter for human consumption so at no time presented a risk to the food supply and milk does not transmit bse. so you can se