Technically, a high yield test would be self-evidently a sign of national strength.
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In our professional judgment, the zero-yield Comprehensive Test Ban Treaty is incompatible with these requirements and, therefore, is inconsistent with America's national security interests.
But a well-contained test could yield no radioactive isotopes, experts say.
They argued, moreover, that a zero-yield, permanent nuclear test ban is manifestly not in the United States' national interest and noted that, given international support for such a treaty, needed changes to either of those key provisions would be unlikely to be accepted by other parties.
"This test registered a yield of several hundred tons as opposed to several kilotons, as you would expect, " the official said.
While testing at that level is better than not being able to test at all, confidence in the credibility of the U.S. nuclear deterrent simply cannot be maintained without the ability to test at higher yield levels at least on an exceptional basis.
Even - whatever the test turns out to be in yield, they will learn something from that.
It will test the resolve of the new leadership teams and yield clues as to how they are likely to react individually and coordinate together in relation to North Korea in future.
In 1996, President Clinton decided to agree to a Comprehensive Test Ban Treaty that entailed a permanent, zero-yield prohibition on all nuclear tests.
North Korea's first test is largely believed to have fizzled, with a yield of less than 1 kiloton, and the second was between 2 and 7 kilotons.
"Because the depth of the test is not known and the geology of the test site is uncertain, translating the seismic magnitude into yield is difficult, " said Acton, the Carnegie analyst.
The moratorium was one of a series of unilateral disarmament actions taken at that time, which included the 1993-94 legislation prohibiting design of low-yield nuclear weapons and the 1995-96 agreement on a Comprehensive Test Ban Treaty (CTBT).
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But such tests often yield false positives, and the former official was unaware whether more definitive test results had been obtained.
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In our second (testing) announcement, before we resume testing several years later, we might describe in some detail the purpose and nature of the test, and document the reductions to date (and planned) in numbers and yield of our stockpile.
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Consequently, I believe that ratifying the Comprehensive Test Ban Treaty an accord that would have imposed a permanent, zero-yield ban on all underground nuclear tests is not in the security interests of the United States.
Consequently, I believe that ratifying the Comprehensive Test Ban Treaty -- an accord that would have imposed a permanent, zero-yield ban on all underground nuclear tests -- is not in the security interests of the United States.
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