The authoritative guide to ensuring science and technology make life on Earth better, not worse.

ballistic missiles

US nuclear submarine

Nuclear Notebook: United States nuclear weapons, 2023

By Hans M. Kristensen, Matt Korda | Nuclear Notebook, Nuclear Risk, Nuclear Weapons

North Korean ICBM on parade

Nuclear Notebook: How many nuclear weapons does North Korea have in 2022?

By Hans M. Kristensen, Matt Korda | Nuclear Notebook, Nuclear Risk, Nuclear Weapons

silhouettes of sailors waving at India plane fly-by

Nuclear Notebook: How many nuclear weapons does India have in 2022?

By Hans M. Kristensen, Matt Korda | Nuclear Notebook, Nuclear Risk, Nuclear Weapons

A large suspected enrichment facility has been constructed at the Kahuta complex since 2014.

Nuclear Notebook: How many nuclear weapons does Pakistan have in 2021?

By Hans M. Kristensen, Matt Korda | Nuclear Notebook, Nuclear Risk, Nuclear Weapons

chemical-filled Iraqi mortar shells being scanned for leaks

The many lessons to be drawn from the search for Iraqi WMD

By Terence Taylor | Chemical Weapons, Nuclear Weapons

North Korea’s military parade on October 10, 2020

Nuclear Notebook: How many nuclear weapons does North Korea have in 2021?

By Hans M. Kristensen, Matt Korda | Nuclear Notebook, Nuclear Weapons

Nuclear submarine HMS Vanguard arrives back at HM Naval Base Clyde, Faslane, Scotland following a patrol. Photo: CPOA(Phot) Tam McDonald/MOD accessed via Wikimedia Commons. Open Government License version 1.0.

Nuclear Notebook: How many nuclear weapons does the United Kingdom have in 2021?

By Hans M. Kristensen, Matt Korda | Nuclear Notebook, Nuclear Risk, Nuclear Weapons

Nuclear Notebook: How many nuclear weapons does Russia have in 2021?

By Hans M. Kristensen, Matt Korda | Nuclear Notebook, Nuclear Weapons

Nuclear Notebook: United States nuclear weapons, 2021

By Hans M. Kristensen, Matt Korda | Nuclear Notebook, Nuclear Weapons

Nuclear Notebook: Indian nuclear forces, 2020

By Hans M. Kristensen, Matt Korda | Nuclear Notebook, Nuclear Weapons

Qased rocket before launch

Iran’s space launches are not a cover for missile work. Until they are.

By John Krzyzaniak | Nuclear Risk

A Russian Topol-M mobile missile at a 2012 parade.

Nuclear Notebook: Russian nuclear forces, 2020

By Hans M. Kristensen, Matt Korda | Nuclear Notebook, Nuclear Risk