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Ukraine

KIEV, UKRAINE, SPAIN - FEBRUARY 26: Firefighters try to extinguish a fire from a bombed civilian building in a residential area on February 26, 2022, in Kiev, Ukraine. A missile has hit this residential building in the capital. Several explosions have rocked Ukraine's capital, Kiev, in the early hours of Saturday morning, and clashes are taking place in the Beresteiska area and at a thermal power station in Troieschyna. (Photo By Diego Herrera/Europa Press via Getty Images)

Ukraine update: Ukrainian forces continue stiff resistance; Putin raises nuclear alert status; Ukrainian and Russian delegations to enter talks

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

A research lab in Kyiv.

US official: Russian invasion of Ukraine risks release of dangerous pathogens

By Matt Field | Biosecurity

TV-watching Russians may be “dangerously unaware” of what Americans think

By Dawn Stover | Nuclear Risk

New sarcophagus, Chernobyl power plant. Credit: Timon91. Accessed via Flickr. CC BY-NC-SA 2.0.

Russian forces now control Chernobyl, inviting speculation and uncertainty

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

The history of NATO enlargement

Ukraine and the post-Cold War world

By Hugh Gusterson | Nuclear Risk, Nuclear Weapons

VIDEO: What Russia’s invasion of Ukraine looks like

By Thomas Gaulkin | Multimedia, Special Topics

A picture of Putin.

Europe’s ‘darkest hour,’ war in a radioactive zone, and fleeing citizens: Putin invades Ukraine

By Matt Field | Analysis

The pathways of inadvertent escalation: Is a NATO-Russia war (now) possible?

By Ulrich Kühn | Nuclear Risk, Nuclear Weapons

Woman handling Russian bills

Russia invaded Ukraine, but imposing financial sanctions like SWIFT may not be the best path forward.

By Aaron Arnold | Analysis

A Ukrainian serviceman pets his dog at a frontline position outside of Novaluhansâke, Ukraine on Tuesday. (Photo by Wolfgang Schwan/Anadolu Agency via Getty Images)

In a historic moment, the West cannot look away from Ukraine

By Thomas Graham, Jr. | Nuclear Risk, Nuclear Weapons

office worker and tank Prague Spring 68

Ukraine 2022: Flashback to Crimea 1993? Prague Spring 1968?

By Dan Drollette Jr | Analysis, What We’re Reading

President Joe Biden announces sanctions after Russia moves troops to Ukraine.

Biden announces new sanctions, moves troops to Baltics. Will Putin order Russian troops further into Ukraine?

By Matt Field | Analysis