A man makes machine adjustment in a room lit with a red glow.


A man makes machine adjustment in a room lit with a red glow.

Home / Mission

The Mission of the NNSS

The Nevada National Security Sites (NNSS) helps ensure the security of the United States and its allies by: supporting the stewardship of the nation’s nuclear deterrent; providing nuclear and radiological emergency response capabilities and training; contributing to key nonproliferation and arms control initiatives; executing national-level experiments in support of the National Laboratories; working with national security customers and other federal agencies on important national security activities; and providing long-term environmental stewardship of the NNSS’s Cold War legacy.

machines with cables coming out of them and round stickers on the front

Stockpile Stewardship

Ensuring the nation’s nuclear weapons stockpile remains safe, reliable, and secure from our enemies.

Global Security

Committed to protecting the American people by working toward a world with fewer nuclear risks.

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Environmental Programs

Addressing the environmental legacy from historic nuclear weapons-related activities and ensuring the health and safety of workers, the public and the environment.

Explore Other NNSS Mission Areas

Security and Emergency Services

Understand how safeguards, security, emergency management and operational measures serve as the response structure supporting the national security mission.

Site-Directed Research and Development

Explore our premier science and technology venue and primary source for discovery and innovation for NNSS national security missions.

Federal Radiological Monitoring and Assessment Center (FRMAC)

Review how this federal asset responds to nuclear and radiological incidents.