Dr. Mark gave the following statistics for the four classes of weapons based on the CASTLE tests: gEcsJakes ae ole Z | a A FOURTH SESSION. (May 28, 1954) At 1:35 p.m. the session on Weapons Matters was resumed with’ the same attendance, In response to a question by the Chairman as to what would happen if no further tests could be held, Dr. Mark said that the 3,000 pound thermonuclear weapon would cause concern until and unless tested. Dr, York agreed and also pointed out that in the development of very small weapons, more tests may be needed therefore than for large weapons. Dr, York gave a brief summary of the present and tentatively proLivermore Program posed program at Livermore. He said that the development of a 3, 000 pound thermonuclear weapon was the goal but that they would be looking at a 1,500 pound weapon as 2 possibility, |©: . . . aia apt? ' PM

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