About a third of an ounce of botulism toxin poured by bioterrorists into a milk truck en route from a dairy farm to a processing plant could cause hundreds of thousands of deaths and billions of dollars in economic losses, according to a scientific analysis that was published yesterday despite efforts by federal officials to keep the details secret. The analysis by researchers at Stanford University, posted yesterday on the Web site of the Proceedings of the National Academy of Sciences, seeks to quantify security weaknesses in the nation’s milk-supply chain and makes recommendations for closing those gaps.Full Story