### The Expiration of the New START Treaty: A Turning Point in US-Russia Nuclear Relations The New Strategic Arms Reduction Treaty (New START), the last significant nuclear arms control agreement between the United States and Russia, expired on February 5, 2026. This treaty had imposed limits on the number of deployed nuclear warheads and delivery systems, fostering a degree of stability in US-Russia relations since its inception in 2010. With its expiration, both nations are now free to expand their nuclear arsenals without any formal constraints, raising alarms about a potential new arms race and increased global nuclear risks [https://www.business-standard.com/world-news/us-russia-nuclear-pact-expires-start-new-treaty-why-it-matters-126020900278_1.html][https://www.nation.com.pk/07-feb-2026/trump-urges-new-nuclear-treaty-russia-agreement-ends]. ### Key Developments Following the Treaty Expiration 1. **Immediate Reactions from Leaders**: - US President Donald Trump rejected Russian President Vladimir Putin's proposal to extend the treaty for one year, labeling the New START as "badly negotiated" and calling for a new, modernized treaty that includes China [https://www.independent.co.uk/news/world/europe/us-russia-nuclear-treaty-start-cold-war-putin-trump-b2915260.html][https://www.geo.tv/latest/649347-trump-rejects-putins-proposal-calls-for-fresh-nuclear-framework-instead-of-new-start]. - The Kremlin expressed regret over the treaty's expiration, indicating a desire for continued arms control discussions [https://www.business-standard.com/amp/world-news/russia-regrets-expiry-of-nuclear-arms-pact-with-us-as-trump-seeks-new-deal-126020600057_1.html]. 2. **Concerns Over Nuclear Arms Race**: - Experts warn that the absence of the treaty could lead to an accelerated arms race, increasing the risk of nuclear conflict [https://www.dynamitenews.com/international/is-nuclear-war-inevitable-after-the-us-russia-arms-control-treaty-expires][https://www.cbc.ca/news/world/nuclear-weapons-treaty-us-russia-start-expired-analysis-9.7076033]. - Former arms control officials have urged both nations to adhere to the limits of the expired treaty as a first step towards new negotiations [https://www.nation.com.pk/07-feb-2026/trump-urges-new-nuclear-treaty-russia-agreement-ends]. 3. **Calls for New Multilateral Agreements**: - The US has proposed trilateral negotiations involving China to establish new nuclear limits, although China has publicly rejected such overtures [https://www.thediplomaticinsight.com/us-urges-nuclear-deal-russia-and-china][https://www.moneycontrol.com/world/us-pushes-for-nuclear-talks-with-russia-and-china-after-new-start-expires-article-13816329.html]. ### Supporting Evidence and Data - **Historical Context**: The New START treaty had been in effect since 2010, capping the number of deployed nuclear warheads at 1,550 for each country, a significant reduction from previous arsenals [https://www.business-standard.com/amp/world-news/trump-seeks-new-nuclear-arms-treaty-with-russia-as-new-start-expires-126020600285_1.html]. - **Current Nuclear Arsenal Estimates**: As of the treaty's expiration, both the US and Russia are now free to expand their nuclear arsenals without any legal limits for the first time in decades, which could lead to increased stockpiling and military tensions [https://www.gulfnews.com/world/last-us-russia-nuclear-pact-expires-prompting-fears-of-a-new-arms-race-1.500432676]. ### Conclusion: Implications of the New START Expiration The expiration of the New START treaty marks a critical juncture in US-Russia relations and global nuclear stability. 1. **Increased Risks**: The lack of formal limits on nuclear arsenals raises the stakes for potential miscalculations and escalations in military posturing between the two nations. 2. **Need for New Agreements**: There is an urgent call for new arms control frameworks that include not only the US and Russia but also other nuclear powers like China to mitigate the risks of an arms race. 3. **Global Security Concerns**: The international community is on high alert, as the dissolution of decades of nuclear arms control could lead to a more unpredictable and dangerous global security environment [https://www.business-standard.com/amp/world-news/russia-regrets-expiry-of-nuclear-arms-pact-with-us-as-trump-seeks-new-deal-126020600057_1.html][https://www.nation.com.pk/07-feb-2026/trump-urges-new-nuclear-treaty-russia-agreement-ends]. In summary, the end of the New START treaty not only signifies a shift in US-Russia dynamics but also poses significant challenges for global nuclear governance and security.