Learn more about Modernizing America’s Nuclear Stockpile
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November 5, 2026For the first time in 20 years, the United States can once again produce a specialized material used in U.S. nuclear weapons, marking a major step toward the modernization of the nuclear stockpile.National Nuclear Security Administration
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November 4, 2026Behind high-security gates at NNSA's Lawrence Livermore National Laboratory in California sits one of the most critical national security assets in America: the National Ignition Facility.National Nuclear Security Administration
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November 2, 2026From weapons modernization and production to infrastructure, counterterrorism, and nonproliferation, the Nuclear Security Enterprise is delivering results.National Nuclear Security Administration
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October 22, 2026Since 2016, its Facility Disposition Program has demolished more than 250 facilities and cleared approximately 3.7 million square feet of degraded infrastructure—roughly the equivalent of 64 football fields.National Nuclear Security Administration
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Press ReleaseOctober 1, 2026NNSA completed all components for the W80-4 nuclear warhead planned for FY 2026, many of them months ahead of schedule, advancing efforts to achieve the FPU of the W80-4 ahead of its end of FY 2027 target.National Nuclear Security Administration
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September 15, 2026As Assistant Secretary for Environmental Management Tim Walsh kicked off the 12th National Cleanup Workshop today, he emphasized that the soon-to-be-named Office of Nuclear Restoration & Revitalization is conducting restoration projects with a sense of urgency and redeveloping former cleanup sites to bring tremendous impact to the local communities and the nation.Office of Environmental Management
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Press ReleaseSeptember 10, 2026NNSA announced today that the Y-12 National Security Complex has completed production of the B61-13 Canned Subassemblies (CSAs) required to support the last production unit needs for the B61-13 program.National Nuclear Security Administration
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Press ReleaseSeptember 9, 2026Advancing from Mission Need to a Defined Project in 18 MonthsNational Nuclear Security Administration
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Press ReleaseAugust 25, 2026NNSA and Pacific Fusion signed a MOU establishing a framework for public-private collaboration as the company broke ground on its Research and Manufacturing Campus in Albuquerque, NM.National Nuclear Security Administration
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July 29, 2026Leaders from NNSA’s Office of Research, Development, Test & Evaluation traveled to the University of Rochester in New York to celebrate the 50th anniversary of the Laboratory for Laser Energetics.National Nuclear Security Administration