Striving for a safer world since 1945.

FAS envisions a world where cutting-edge science, technology, ideas and talent are deployed to solve the biggest challenges of our time. We embed science, technology, innovation, and experience into government and public discourse in order to build a healthy, safe, prosperous and equitable society.

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Global Risk
Press release
Nuclear Notebook: Russian Nuclear Weapons 2025 Federation of American Scientists Unveils Comprehensive Analysis of Russia’s Nuclear Arsenal

Russia currently maintains nearly 5,460 nuclear warheads, with an estimated 1,718 deployed. This represents a slight decrease in total warheads from previous years but still positions Russia as the world’s largest nuclear power alongside the United States.

05.13.25 | 3 min read
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Clean Energy
Blog
AI, Energy, and Climate: What’s at Stake? Hint: A lot.

The stakes are high: how we manage this convergence will influence not only the pace of technological innovation but also the equity and sustainability of our energy future.

05.12.25 | 6 min read
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Government Capacity
Blog
Bridging Innovation and Expertise: Connecting Federal Talent to America’s Tech Ecosystems

We’re launching an initiative to connect scientists, engineers, technologists, and other professionals who recently departed federal service with emerging innovation ecosystems across the country that need their expertise.

05.09.25 | 5 min read
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Environment
Press release
The Federation of American Scientists Joins Coalition to Prepare for and Prevent Wildfires

With wildfire risk increasing and the potential for destruction along with it continues to grow nationwide, the Federation of American Scientists (FAS) today joins with other organizations to launch a new coalition, Partners in Wildfire Prevention.

05.07.25 | 3 min read
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Day One Project Day One Project
Changing Policy
from a Noun to a Verb.
We connect people with ideas to training in policy entrepreneurship, and give them access to the tools, mindsets, and networks that can shape ideas into reality through our Day One platform.
Accelerators
Memos
Ideation campaigns
Idea challenges
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Talent Hub
FAS Fellowships provide opportunities for impact across the science and technology policy community.
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Fiscal Sponsorship
The FAS Fiscal Sponsorship Program seeks to support burgeoning entrepreneurs in science and technology policy.
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