On the recordJuly 20, 2005
an important part of U.S. nuclear nonproliferation policy is the continuing effort to deter other countries from testing a nuclear weapon. It is often said that a country could build a relatively simple nuclear weapon, like the bomb exploded at Hiroshima, and use it with confidence even though it has not tested the device. That does not hold true, however, for more complex designs; and military commanders are loath to rely upon any weapon that has not been tested. One major way to deter countries from conducting nuclear weapons tests is to ensure that such a test would be detected. That's because most countries, as signers of the Comprehensive Nuclear Test-Ban Treaty, the CTBT, are bound to refrain from acts that would undermine the object and purpose of that treaty, even though it has yet to enter into force. In addition, nearly all nuclear weapons states, including some that are not parties to the CTBT, have proclaimed unilateral moratoria on nuclear weapons tests. Thus, there are both legal and political barriers to openly testing nuclear weapons. How can we make it more likely that a covert nuclear weapons test would be detected and identified? One way is through U.S. and allied data collection, including the fine seismic network put together by the Air Force Technical Applications Center, or AFTAC. I support and applaud the work of AFTAC, which is truly a center of excellence.…
Source
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