• The U.S. will leverage its unlimited stockpile of precision gravity bombs, with Secretary of Defense Pete Hegseth emphasizing advancements in the B61-12 and B61-13 variants amid ongoing modernization efforts.
  • Full-scale production of the B61-12 is set to wrap up in 2026 following a $9 billion upgrade, while the B61-13, a higher-yield variant, was produced nearly a year ahead of schedule in May 2025.
  • These developments, driven by U.S. government agencies like the National Nuclear Security Administration (NNSA), support deterrence strategies and align with President Trump's "peace through strength" agenda, with production budgeted at $92 million over four years.

In a move signaling heightened defense readiness, U.S. Secretary of Defense Pete Hegseth announced plans to utilize the nation's unlimited stockpile of precision gravity bombs, referencing recent breakthroughs in the B61-12 and B61-13 nuclear variants. This statement comes as the National Nuclear Security Administration (NNSA) completes critical flight tests and ramps up production, underscoring a rapid modernization push that officials say bolsters national security without expanding the overall nuclear arsenal.

According to people familiar with the matter, the NNSA successfully validated the B61-12's compatibility with the F-35 fighter in August 2025 at the Tonopah Test Range in Nevada, capping a multiyear life-extension program finished in late 2024. Full-scale production, which started in May 2025, is on track to conclude by 2026, consolidating older B61 models into a more reliable and precise system. Simultaneously, the first B61-13 unit—boosting yield capabilities up to 360 kilotons compared to the B61-12's 50 kilotons—rolled off the line at the Pantex Plant in Texas, nearly a year ahead of schedule. This accelerated timeline, sources note, was enabled by streamlined design reviews and congressional funding, leveraging existing production lines for cost efficiency.

Energy Secretary Chris Wright highlighted the strategic importance of these advancements, stating they reinforce deterrence against adversaries with hardened underground facilities. "It's about providing the president more options in a complex threat environment," he said in a recent briefing, echoing the administration's focus on "peace through strength." Efforts to integrate these bombs with advanced aircraft like the F-35 have hit milestones, including thermal preconditioning tests under extreme conditions, though challenges in maintaining encryption and reliability persist. Industry insiders report that production at facilities such as Pantex and Sandia National Laboratories is creating jobs and boosting defense industry efficiency, part of a broader U.S. nuclear modernization projected to exceed $1 trillion through 2080.

Without a deal to sustain these efforts, analysts warn, the U.S. could face gaps in its deterrence posture. The B61 family, deployed since 1968, has undergone repeated upgrades, with the latest life-extension addressing aging components after 17 years of development. The B61-13 builds directly on this legacy, offering enhanced accuracy against evolving threats. In the short term, NNSA plans to shift to full B61-13 production in fiscal year 2026, enhancing targeting flexibility without increasing stockpile numbers. Long-term, these upgrades are expected to extend the bombs' service life by over two decades, though experts caution that sustained testing and surveillance will be crucial to ensure reliability.

Attempts to reach out for comment from NATO allies were unsuccessful, but sources indicate the developments align with longstanding basing agreements, reinforcing alliance security. As production accelerates, market watchers note a focus on real-time advancements rather than historical context, with minimal public debate despite arms race concerns. This article was updated to clarify that the B61-13 replaces some B61-7s without expanding the overall stockpile.