The White House today unveiled a new homeland security presidential directive establishing a national policy for protecting the food system from terrorists and natural disasters. As part of that policy, the secretaries of agriculture, health and human services and homeland security will produce expanded vulnerability assessments for the country's food sector, HSPD-9 states. The assessments will be used to inform the Department of Homeland Security's National Infrastructure Protection Plan. In addition, the homeland security secretary will work with the attorney...