l or psychological effects. Webster's Dictionary defines mass as "A large amount, quantity or number." Therefore, weapons of mass destruction could be defined as any weapon that produces a large number or percentage of casualties; these and are substances, solid, liquid or gaseous, which may be employed due to their direct toxic effect on man, animal, or plants.
             Biological agents are defined as microorganisms (bacterial or virulent) or toxins that cause disease in man, plant, or animal. Toxins may be natural (such as snake venom or botulism) or synthetic. Bacteria and viruses are naturally occurring and are usually enhanced (weaponized) to increase the effectiveness of the disease-causing organism.
             Biological agents can be spread in a variety of ways; most commonly we think of poisoned water supplies and crop-dusters spreading d
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