what will have the more devastating effect??.a bomb that will kill thousands..[if they are lucky]..the twin towers was a lucky hit for the terrorists when they collapsed,or the contamination of the food chain which will kill millions of people and bring economic ruin for the the food retail giants..not to mention the fear that it would cause..poisioning the very basis of our lifestyle would cause death,fear and economic disaster in one hit..its not beyond the realms of possibility..and dont forget the death of bin laden has not been avenged yet by his supporters..worrying times ahead i fear...