Nuclear notebook
1 July 2009

U.S. Nuclear Warheads, 1945-2009

Robert S. NorrisHans M. Kristensen

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Hans M. Kristensen

Kristensen is the director of the Nuclear Information Project with the Federation of American Scientists (FAS) in Washington, DC. His work focuses on researching and writing about the status of...

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Robert S. Norris

Robert S. Norris

Robert S. Norris

Norris is a senior fellow with the Federation of American Scientists in Washington, DC. A former senior research...

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Of 100 types of U.S. warheads developed since 1945, only 15 remain active. New warhead production ceased in 1992, but modified warheads continue to be introduced.

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Issue: Bulletin of the Atomic Scientists Volume 65 Issue 4