The following is a good start (I do not endorse much of this): [PDF]Statistics for Homeland Defense (ASA Chance Magazine) www.stat.duke.edu/chance/151.banks.pdf I addressed this topic in my presentation titled "Bioterrorism - What are we measuring?" at the ICED 2002 (International Conference on Emerging Infectious Diseases - CDC/ASM). I recommended that at this stage, emphasis should be given to qualitative methods in order to identify and characterize relevant variables and constructs that should be measured. We statistician can then go on to model and predict - otherwise, what are we measuring? Regards, Rossi A. Hassad, MPH, PhD Assistant Professor, Mercy College, NY