capabilities at hand - aircraft, ships, equipment, trained personnel, etc. and (b) the inhabitants were unaware of the potential hazard and were very cooperative. If there were a large and less amiable population, im- bued with fear, rightly or wrongly, and there were only limited capabilities at hand for protective action - as might prevail under the conditions suggested for this symposium of a nuclear mass disaster - then there could be a different result. This is all the more reason to proceed as far as possible now in the developing of practical radiation protection guides that can be synthesized into overall disaster plans and to conduct active programs of public education. DOE ARCHIVES 10