An ad hoc committee reviewed and updated the analysis and recommendations in the 2002 CISAC report titled Technical Issues Related to the Comprehensive Nuclear Test Ban Treaty, and the 2002 National Academies’ report, Technical Issues Related to the Comprehensive Nuclear-Test Ban Treaty. It drew on the latest evidence in each area, and on relevant science and technology developed since the original study. The report produced by the study was to inform future Senate debate of the Treaty. Maintaining the safety and reliability of the U.S. stockpile, nuclear explosion detection, location and identification, sustainability, and technical advances were considered.