S. stockpile of nuclear weapons does not, in practice, depend on a program of nuclear test explosions.Rather reliability is ensured by nonexplosive testing that is not restricted by the CTBT.

• 但美国现有核子武器的设计已经过验证，其可靠性其实不是仰赖核子试爆计画，而是取决于不受CTBT限制的非爆炸性测试。