Learn more about Modernizing America’s Nuclear 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.