Two Nuclear Wrongs Don’t Make a Right

Why It Matters

Resuming U.S. nuclear testing would breach the CTBT, erode global non‑proliferation norms, and likely provoke rival states to restart their own tests, destabilizing international security.

Key Takeaways

• Trump’s 2025 directive pushes U.S. toward nuclear testing by 2028
• CTBT still lacks entry into force; nine key states haven’t ratified
• Low‑yield tests remain hard to detect without on‑site inspections
• Confidence‑building measures could curb testing cascade and preserve nonproliferation

Pulse Analysis

The Comprehensive Test Ban Treaty, signed by 187 nations, remains in limbo because nine nuclear‑armed states have not ratified it. While the treaty enjoys near‑universal political support, the lack of formal entry into force means the International Monitoring System cannot be complemented by short‑notice, on‑site inspections—tools essential for detecting sub‑kiloton experiments. This regulatory gap is now being exploited by political rhetoric in Washington, where former President Trump’s 2025 directive has revived discussions of a U.S. test program, despite technical assessments that no new explosive testing is required for the nation’s deterrent.

Detection technology has improved, yet low‑yield detonations—on the order of a few tons of TNT—still evade definitive identification. The U.S. National Nuclear Security Administration’s February 2026 internal planning document outlines a roadmap to execute the president’s testing directive by 2028, highlighting a strategic shift from scientific confidence‑building to political posturing. Parallel proposals from civil‑society experts and NNSA leadership suggest reciprocal radiation‑monitoring at subcritical experiments among the United States, Russia, and China, a measure that could restore some verification capability even before the CTBT formally enters force.

If the United States were to resume explosive testing, the move would likely trigger a chain reaction, prompting other nuclear powers to conduct their own tests to maintain strategic parity. Such a cascade would erode decades of non‑proliferation progress, increase the risk of accidental escalation, and complicate diplomatic efforts at the upcoming NPT Review Conference. Strengthening confidence‑building mechanisms and insisting on transparent, multilateral verification remain the most viable paths to preserve the global testing moratorium and safeguard international security.