Nuking the Nuke Ban

An interagency intelligence assessment of the controversial Comprehensive Nuclear Test Ban Treaty (CTBT) concludes that verifying the pact’s ban on nuclear tests remains difficult and that verification problems remain unresolved since the Senate first rejected the treaty in 1999. U.S. officials familiar with the assessment said the negative estimate contrasts with a new, more optimistic, assessment of the treaty set for release on Friday by the National Academy of Sciences (NAS).