Nuclear Proliferation and the “Nth Country Experiment”
Washington, D.C., January 23, 2025 - Today, the National Security Archive publishes newly declassified information on a secret mid-1960s project in which a handful of young physicists at Lawrence Livermore Laboratory produced a design for a “credible nuclear weapon” based only on unclassified, open-source information and in just three years. One of the participants described the experiment as “truly a do-it-yourself project,” according to one of the recently declassified records.
