BERBER REREREEER TERT EE by residents at Rongelap, Utirik and Bikini and the general belief that more technical data were required to assess atoll safety. Rongelap and Utirik initially were not thought to be affected by the radiation fallout generated by the different nuclear tests. However, prevailing weather conditions during a thermonuclear detonation at Bikini Atoll on March 1, 1954 produced radiation fallout on Rongelap and Utirik; consequently numerous residents suffered radiation exposure despite evacuation efforts. The Rongelap people were displaced from their community for three years, the people of Utirik for three months. While no deaths occurred, acute thyroid radiation effects we detected initially among the Rongelapese, Hence, later among the Utirikese. the Rongelap and Utirik people had to contend with the physical and psychosocial hardships imposed by short-term relocation and bio- logical side effects of radiation exposure. Bikinians who returned to Bikini Island are beginning to experience some biological side effects of radiological contamination. Before Bikinians were permitted to return, they were informed that the island was relatively safe for habitation. not to consume certain natural foods, pandanus, breadfruit and coconut. for consumption. However, they were warned especially the flora such as Marine life was considered safe Apparently Bikinians disregarded the safety warnings and consumed toxic foods; as a result, increased body burdens of cesium have been detected among residents. Consequently, Bikinians were recently told that further rehabitation of Bikini Island was undesirable and again reminded of the risks associated with consumption of certain flora. The biological problems experienced by people at Rongelap,