On the basis of Stewart's prediction of 300-800 excess cancers per 106 person-rads, the Japanese should have shown 10.5 to 28 cases/35,000 person-rads. The observed number of cases was one. Storer pointed out that this is the third major prospective study that has been unable to demonstrate an increased risk of cancer from in utero radiation, whereas nearly all retrospective studies show a significant association. Miller again voiced the argument he presented so well in his article in Science (166: 569-574, 1969), namely that retrospective studies of the Stewart type may contain a systematic error which has so far been impossible to identify. Dr. Finch raised the question of whether it might be possible to obtain Stewart's data for further study by DBM. Dr. Miller suggested that similar data by Dr. McMahmmight be more easily obtained. Dr. Cohen warned against any out-of-hand dismissal of the results of retrospective studies, Mr. Joe Dea* of the DBM staff reported on civil defense studies concerning the status of the U.S. shelter program as compared to the rest of the world. The U.S. is apparently considerably behind the rest of the world in dual use shelter planning. The report of the study will go to the National Security Agency for a committee to consider it. Mr. Deal argues quite plausibly that new construction should consider incorporating shelters. This approach will provide shelters much less expensivly than if shelters have to be built later. He also described in some detail the aerial radiological monitoring survey program. This program, which is supported by DBM, recently located a missile for the Department of Defense. The missile had missed its targeted area in Southern New Mexico and had landed in the Mexican desert. At the last moment the AEC was called in and was able to pinpoint the impact site using the aerial radiological monitoring system. Dr. Wood of the DBM staff described the current status of phosphor development by the Lockheed Company under contract to DBM. Dr. Wood also described the current status of the negative pi-meson facility at the Los Alamos Scientific Laboratory. At the moment there are no funds allocated for a Bio-Medical Facility in connection with the pi-meson program. Unless funding is forthcoming to construct an area for biomedical research, then either no biomedical research can be done or the entire facility would necessarily have to be shut down for a prolonged period of time at a later date to enable such construction.