~9of nuclear tests, and a failure to resume nuclear weapons tests, with or without an agreement on control. In general, the position of the lab is that progress in the development of nuclear weapons, of the variaties which will be described in a later section, can proceed only at a very much slower rate if nuclear weapons tests are not resumed (at least underground) in the near future. Some very important kinds of weapons involving really new ideas cannot be developed at all if no nuclear tests are allowed. However, the lab considers its function to be the most rapid development of nuclear weapons under whatever circumstances may be dictated by national policy." In a lengthy discussion of the weapons development and weaponization programs, it is stated that currently, "Just under 1/2 of the direct effort devoted to the program of nuclear devices and warheads is expended in the weaponization phase, We expect it will be necessary for this percentage to grow to rather more than half by Sept. 1960. testing were not resumed.) (This would be if Hopefully the weaponization effort would then become more efficient and the percentages could be reversed back into a majority in the development of advanced designs. Under the major heading of test planning and development, Livermore's assumption that a resumption of weapons testing will have tests being only underground and completely contained is noted, with the exception of a later possibility of outerspace tests. "An increasing degree of confidence in underground diagnostic technology has also developed, and a continuing program of theoretical and experimental work will further increase the reliability and capability of our diagnostic techniques. We are continuing the excavation of tunnels at NTS to provide shot sites for yields up to about 30 kt. Preparation of specific shot sites has proceeded up to a point where the next step is scientific construction, pacticularly installation of diagnostic cables and bunker operating facilities. During the next two years, if such testing resumes, underground sites for testing in the 100-200 kiloton range can be constructed and used."