Since 1987, the Bulletin of the Atomic Scientists has published the Nuclear Notebook, an authoritative accounting of world nuclear arsenals compiled by top experts from the Federation of American Scientists. Today, it is prepared by Hans M. Kristensen, Matt Korda, Eliana Johns, and Mackenzie Knight of FAS. Because of its importance to researchers, governments, and citizens around the world, the Nuclear Notebook is always free-to-access. The Nuclear Notebook interactive above provides a colorful look at the arsenals of all nine nuclear weapons states: United States, Russia, United Kingdom, France, China, Israel, India, Pakistan, and North Korea. Below are the most recent published reports.