Policy & Ethicsarms controlnuclear armsmultilateral diplomacy
New START Expiration Ends U.S.-Russia Nuclear Limits
8.1
New START, the 2010 U.S.-Russia arms control treaty, expired on Feb. 5, 2026, ending binding limits of 1,550 strategic warheads per side. The lapse removes on-site inspections and data exchanges, raising risks of an unpredictable three-way nuclear buildup involving the United States, Russia and China. Experts warn it increases nuclear dangers and pressures policymakers to pursue new multilateral restraints and verification mechanisms.
Key Points
- 1Ends New START caps, removing 1,550-warhead limits and inspection and data-exchange obligations.
- 2Elevates risk of an unpredictable three-way arms race among the United States, Russia, and China.
- 3Requires policymakers to seek multilateral verification, address AI and cyber challenges, and pursue restraint.
Scoring Rationale
High geopolitical significance driven by official treaty lapse and potential arms race, but limited direct technical actionability.
Sources
Public references used for this report.
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