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Photo Gallery: National Labs and the Science Behind Nuclear Security

From medical isotopes to nuclear energy to global security, the National Labs are nuclear experts.

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History of the Energy Department's Role in Nuclear Security

A timeline of nuclear security at the Department of Energy from the Manhattan Project to present day.

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Why the Nuclear Stockpile Needs Supercomputers

NNSA supercomputers are a key part of our ability to keep our nuclear stockpile safe, secure and effective.

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As long as nuclear weapons exist, the United States will maintain a safe, secure and effective nuclear deterrent to keep America safe. In support of this presidential mandate, the Energy Department — specifically the National Nuclear Security Administration (NNSA) — is responsible for ensuring the integrity and safety of the nation’s nuclear weapons, advancing nuclear nonproliferation and promoting international nuclear safety.