boarding target ships returning to Kwajalein. The most difficult responsibility concerned removal of ammunition from the ships. Due to the uncertainty about internal absorption of radioactive material, we required men to wear respirators during the operation on the ship. The safety procedures at Kwajalein were well adhered to and I do not recall any overexposures. CROSSROADS was an operation great in scope and number of participants. There had been no previous radiation experience with Operations of this type. It is not surprising that unexpected radiation hazards developed. However, I was impressed with how well the Rad-Safe administration kept abreast of the radiation situation, acting promptly to prevent overexposure of personnel when hazardous Situations developed. Rad-Safe section, In spite of the problems faced by the I think they functioned well. The scarcity of individuals exceeding the permissible level attests to this. AS a post-script I would like to comment on several aspects of the fallout effects on the Marshallese exposed to fallout which have a bearing on exposures of CROSSRAODS personnel. First, with regard to radiation of the skin. The Marshallese had heavy contamination of the skin which resulted in development of so called "peta burns” in three fourths of the Rongelap people within a few weeks of exposure. However, the burns healed rapidly and after