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TOP SECRET SECURITY INFORMATION would be effective against attack by guided missiles coming in at supersonic speeds. 3. The Contrasts in the Target Systems The industrial target system of the U. S. has structural characteristics that make it particularly vulnerable to heavy atomic attack. Furthermore, practically all the information needed by Soviet target analysts in planning an attack has been readily avail- able in available and open sources. Even the location of atomic energy and other newer and vital facilities could not have been con- - cealed from communist agents. It has been estimated that effective atomic attack on only 19 major U. S. industrial centers would destroy or critically damage one-half of our basic war supporting capability. There would seem to be no question that these facts are as well known in Moscow as they are in Washington. In contrast, the Soviet target system is made up of a larger number of smaller industrial concentrations. Nuclear weapons lend themselves to the massive, brief assault required for a decisive, single blow. The Soviet target system, as compared with that of the U. S. , is less vulnerable to attack that relies heavily on mass effect; and it requires greater strategic selectivity. Of the two efforts for a decisive blow, the one on the U. S. S. R. would have to be more carefully planned (despite our limited information), and would require a greater aerial effort. Offsetting these disad- vantages from the U. S. point of view, may be the higher criticality of individual Soviet industrial facilities as compared with the larger and stronger structure of American industry. It must be TOP CEORET SCORCT SECURITY INFORMATION Page 11 of 16

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