Learn more about Modernizing America’s Nuclear Stockpile

NNSA completed the first unit of the Mark (Mk) 4B reentry body for the W76 nuclear warhead supporting sea-based strategic deterrence.

NNSA announced the completion of Phase One of the Kansas City Non-Nuclear Expansion Transformation (KC NeXT). NNSA assumed property ownership ahead of schedule and on budget. Phase One includes a 700-seat classified office building.

NNSA has approved the Enhanced Fusion Yield Capability project, a move made faster by Secretary Wright's streamlining regulations. This initiative will boost the laser energy at the National Ignition Facility, enabling more pertinent assessments and modernization efforts for the nation's nuclear weapons stockpile.

NNSA today issued its Final Site-Wide Environmental Impact Statement and Record of Decision to implement an Expanded Operations Alternative to manage Los Alamos National Laboratory in the coming years.

NNSA achieved a significant milestone by completing a record number of 13 tritium extractions within nine months, spanning fiscal year (FY) 2025 and 2026. Tritium, an isotope of hydrogen, is a key element in nuclear weapons.

NNSA has completed the Last Production Unit of the W88 Alteration 370, a multiyear program to modernize the W88 nuclear warhead carried onboard Ohio-class ballistic missile submarines.