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

North Korea

Michael Krepon, co-founder of the Stimson Center think tank, shows an aerial picture taken by the US military in the days after the first atomic bomb was dropped on Hiroshima on August 6, 1945. The institution later gifted the photos to the Hiroshima Peace Memorial Museum. (Photo credit: NICHOLAS KAMM/AFP via Getty Images)

Interview: Arms control expert Michael Krepon on a broader approach to keeping the nuclear peace

By John Mecklin | Nuclear Risk, Nuclear Weapons

satellite image of area near N Korea nuke research plant

Machine learning improves satellite imagery analysis of North Korean nuclear activity

By Sulgiye Park, Allison Puccioni, Rodney C. Ewing | Technology and Security

People walk past a television screen showing a news broadcast with file footage of a North Korean missile test, at a railway station in Seoul on January 11, after North Korea fired a "suspected ballistic missile" into the sea, South Korea's military said, less than a week after Pyongyang reported testing a hypersonic missile. (Photo by Anthony Wallace/AFP via Getty Images)

North Korea’s goals in 2022: internal stability and nuclear development

By Duyeon Kim | Analysis, Nuclear Weapons

Nuclear submarine HMS Vanguard. Photo: CPOA(Phot) Tam McDonald/MOD accessed via Wikimedia Commons. Open Government License.

The 2021 nuclear year in review—with five enduring stories

By Susan D’Agostino | Nuclear Energy, Nuclear Risk, Nuclear Weapons

South Korean missiles on display at the Korean War Memorial. Credit: Daniel Foster. Accessed via Flickr. CC BY-NC-SA 2.0.

How bad would a nuclear-armed South Korea be? Let us count the ways.

By Lauren Sukin | Nuclear Risk, Nuclear Weapons, Opinion

North Korean leader Kim Jong-un. Credit: The Presidential Palace and Information Office (Russia). Accessed via Wikimedia Commons. Attribution 4.0 International (CC BY 4.0)

North Korea restarted nuclear reactor for plutonium production, IAEA says

By Susan D’Agostino | Nuclear Risk, 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

Mohammad Javad Zarif, in 2019

“Transactional” nuclear diplomacy may provide a path toward “grand bargains” with Iran and North Korea

By Christopher Lawrence | Nuclear Weapons

2014 missile launch of the Iskander-M missile system. North Korea’s March 25, 2021 missile test appears to be an improved variant of the Russian Iskander-style short-range ballistic missile. Credit: Ministry of Defence of the Russian Federation via Wikimedia Commons. CC BY 4.0.

North Korea’s “tactical-guided” ballistic missile test is no joke for Biden and South Korea

By Duyeon Kim | Nuclear Risk, Nuclear Weapons

Kim Jong Un at the 8th Workers Party Congress. Photo credit: KCNA via KCNA Watch.

What North Korea’s Party Congress means for Biden and the world

By Duyeon Kim | Nuclear Weapons

Watch Now: The Korean Peninsula, the Incoming Biden Administration, and Advice from Four Former Chief Negotiators

By Halley Posner | Nuclear Risk

Robert Alvarez with Li Gun in North Korea.

2003: North Korea: No bygones at Yongbyon

By Robert Alvarez | Nuclear Weapons