Ya, and to add to that, it's often difficult to define what exactly the 'field' is. Is the field biology? Is it statistics? Risk? The anthropology of terrorism?

Ya, and to add to that, it's often difficult to define what exactly the 'field' is. Is the field biology? Is it statistics? Risk? The anthropology of terrorism? Answering a complex question like "will there be a bioterror event that kills 1 million people" doesn't really fit neatly into any of these categories, because it combines information from a number of fields to synthesize the final answer.