WASHINGTON, Aug. 19 (TNSLrpt) -- The Congressional Research Service issued the following In Focus white paper (No. IF11662) on Aug. 18, 2025, by defense policy analyst Anya L. Fink and nonproliferation specialist Mary Beth D. Nikitin: * * * U.S. Nuclear Weapons Tests The United States has observed a voluntary moratorium on nuclear explosive testing since 1992, although it has maintained the ability to resume these tests at the Nevada National Security Site (NNSS). Since 1993, it has used a pr  more