Learn more about 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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October 8, 2026One of NNSA’s core missions is to ensure the U.S. maintains a safe, secure, and reliable nuclear stockpile.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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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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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
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July 15, 2026NNSA authorized startup of the Calciner Project at the Y-12 National Security and supports ongoing efforts to transform and recapitalize Y-12 in support of the nation’s nuclear deterrent mission.National Nuclear Security Administration
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July 8, 2026NNSA announced today that it had completed “diamond stamping” of all canned subassemblies (CSA) for the B61-13 nuclear gravity bomb planned for the current Fiscal Year three months ahead of schedule at the Y-12 National Security Complex.National Nuclear Security Administration
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Press ReleaseJune 26, 2026NNSA completed the West End Protected Area Reduction (WEPAR) Project, a major project that modernizes security at the Y-12 National Security Complex while reducing the site’s high-security area.National Nuclear Security Administration