. fe 3, By letter dated September 24, 1954 (amc 540/22), the Office of Defense Mobilization was advised that the Commission understood that the Department of Defense was considering for planning purposes, 4, the effects of a 60 MT weapon, By letter dated April 15, 1955 (AEC 540/39), the ODM requested the Commission to consider release of the 60-megaton yield as the basis for vulnerability planning, or, alternatively, such other yield as the Commission may indicate, 5. By letter dated February 10, 1955 (AEC 540/37), the HCDA indicated the need for effects information for civil defense planning, particularly with respect to the fallout from largeyield weapons, and noted that civil defense support by State and local bodies requires convincing facts regarding effects of atomic weapons, 6. Based on the above reauirements the staff has recommended that the effects handbook be revised to inelude a broad range of effects information on yields from 1 to 100 MT without revealing stockpile values, 7. To determine the optimum yield of an enemy weapon that can be used as a dispersal planning figure by ODM, the staff has recommended formation of a technical group with DOD, ODM, and CIA membership, AEC, The general information requested by ODM will be made available at the earliest practicable date from declassified information that will eventually be included in the revised handbook "The Effects of Atomic Weapons". STAPTJUDGMENTS 8, The Divisions of Biology and Medicine, Classification, . and Intelligence, and the General Counsel concur in the action recommended in this paper,