Practice Relating to Nuclear Weapons
In 1996, during a debate in the First Committee of the UN General Assembly, Botswana stated:
We welcome the adoption of a Comprehensive Nuclear-Test-Ban Treaty (CTBT) as a step in the right direction towards the complete elimination of nuclear weapons … Our hope was that such a Treaty would not only ban nuclear explosions, but cover all aspects of activity related to the further development of nuclear weapons, such as computer simulations. We hope and pray that this was not a deliberate drafting ploy, by those with the wherewithal, to rid themselves of an obsolete and controversial exercise while leaving room for the exploitation of their unmentioned but known capacity. 
Botswana, Statement before the First Committee of the UN General Assembly, UN Doc. A/C.1/51/PV.13, 24 October 1996, p. 3.