Nuclear Notebook: How many nuclear weapons does the United States have? To download a free PDF of this complete article, click this link. To read an authoritative accounting of world nuclear arsenals, click here for all Nuclear Notebook columns. The Nuclear Notebook is researched and written by Hans M. Kristensen, director of the Nuclear Information … Continued

Nuclear Notebook: Nuclear security and the Internet To download a free PDF of this complete article, click this link. To read an authoritative accounting of world nuclear arsenals, click here for all Nuclear Notebook columns. The Nuclear Notebook is researched and written by William M. Arkin and Robert S. Norris of the Nuclear Information Project … Continued

Nuclear Notebook: How many nuclear weapons does China have? To download a free PDF of this complete article, click this link. To read an authoritative accounting of world nuclear arsenals, click here for all Nuclear Notebook columns. The Nuclear Notebook is researched and written by William M. Arkin and Robert S. Norris of the Nuclear … Continued

Nuclear Notebook: How many nuclear weapons do France and the United Kingdom have? To download a free PDF of this complete article, click this link. To read an authoritative accounting of world nuclear arsenals, click here for all Nuclear Notebook columns. The Nuclear Notebook is researched and written by William M. Arkin and Robert S. … Continued

Nuclear Notebook: How many nuclear weapons does Russia have? To download a free PDF of this complete article, click this link. To read an authoritative accounting of world nuclear arsenals, click here for all Nuclear Notebook columns. The Nuclear Notebook is researched and written by William M. Arkin and Robert S. Norris of the Nuclear … Continued

Nuclear Notebook: How many nuclear weapons does the United States have? To download a free PDF of this complete article, click this link. To read an authoritative accounting of world nuclear arsenals, click here for all Nuclear Notebook columns. The Nuclear Notebook is researched and written by William M. Arkin and Robert S. Norris of … Continued

Nuclear Notebook: How many nuclear weapons have been produced in the world? To download a free PDF of this complete article, click this link. To read an authoritative accounting of world nuclear arsenals, click here for all Nuclear Notebook columns. The Nuclear Notebook is researched and written by William M. Arkin and Robert S. Norris … Continued

Nuclear Notebook: A history of nuclear deployments To download a free PDF of this complete article, click this link. To read an authoritative accounting of world nuclear arsenals, click here for all Nuclear Notebook columns. The Nuclear Notebook is researched and written by William M. Arkin and Robert S. Norris of the Nuclear Information Project … Continued

Nuclear Notebook: How much plutonium has been stockpiled by nuclear nations? To download a free PDF of this complete article, click this link. To read an authoritative accounting of world nuclear arsenals, click here for all Nuclear Notebook columns. The Nuclear Notebook is researched and written by William M. Arkin and Robert S. Norris of … Continued

Nuclear Notebook: How many nuclear weapons does the United Kingdom and France have? To download a free PDF of this complete article, click this link. To read an authoritative accounting of world nuclear arsenals, click here for all Nuclear Notebook columns. The Nuclear Notebook is researched and written by William M. Arkin and Robert S. … Continued

Nuclear Notebook: How many nuclear weapons does China have? To download a free PDF of this complete article, click this link. To read an authoritative accounting of world nuclear arsenals, click here for all Nuclear Notebook columns. The Nuclear Notebook is researched and written by William M. Arkin and Robert S. Norris of the Nuclear … Continued

Nuclear Notebook: How many nuclear weapons does Russia have? To download a free PDF of this complete article, click this link. To read an authoritative accounting of world nuclear arsenals, click here for all Nuclear Notebook columns. The Nuclear Notebook is researched and written by William M. Arkin and Robert S. Norris of the Nuclear … Continued

Nuclear Notebook: How many nuclear weapons does the United States have? To download a free PDF of this complete article, click this link. To read an authoritative accounting of world nuclear arsenals, click here for all Nuclear Notebook columns. The Nuclear Notebook is researched and written by William M. Arkin and Robert S. Norris of … Continued

Hans Kristensen explains why it is more dangerous for the United States to keep the 2018 nuclear stockpile data classified then it is to make it public.

Watch the Bulletin virtual program, “The UK’s new nuclear posture: What it means for the global nuclear order” featuring Hans Kristensen and Heather Williams in conversation with Julian Borger.  

Three days ago, in a jarring answer to a question from the media, Russian President Vladimir Putin said allowing Ukraine to join NATO would increase the prospects of a Russia-NATO conflict that could turn nuclear.

July 2020 Cover design by Thomas Gaulkin.  In this issue, we focus on the undeniable physical impacts of a changing climate and why that physical evidence can’t reasonably be explained, except as a result of warming caused by greenhouse gas emissions.    Features Why the atomic bombing of Hiroshima would be illegal today By Katherine … Continued

Read the 2019 Clock statement By Bulletin Science and Security Board | Doomsday Clock Overview of Doomsday Clock By Bulletin Staff | Doomsday Clock FAQs about the Clock By Kennette Benedict | Doomsday Clock Missed it? The 2019 Clock announcement, on video By Bulletin Staff | Doomsday Clock CNN OpEd, by Jerry Brown and William … Continued

Here, guest editors Zia Mian and M.V. Ramana select a few of the many articles on nuclear South Asia that have been published by the Bulletin.

Swashbuckling military action in outer space occupies a hallowed place in American popular culture. But in the 1980s, fiction and reality fused in the form of President Reagan’s Strategic Defense Initiative, a “pipe-dream” of a missile defense program. Now, President Trump’s announcement of a US Space Force has brought militarized space fantasies back to the … Continued