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Transportation Secretary Ray LaHood (center) examines the new Driver Alcohol Detection System for Safety in Waltham, Mass., on Friday. One of the prototype components is a small black box attached to wires (far right). Shane Karr (right), vice president for Federal Government Affairs at the Alliance of Automotive Manufacturers, looks on. Laura Dean Mooney (left), national president of Mothers Against Drunk Driving, watches. (Associated Press)

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