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What happens if Russia nukes Ukraine?

What Happens If Russia Nukes Ukraine? | The Risks & Consequences | GZERO World

How should the US respond if Russia uses a tactical nuclear weapon in Ukraine?
Unlike strategic ones, tactical nukes are not subject by signed treaties, so all bets are off, New York Times national security correspondent David Sanger tells Ian Bremmer on GZERO World. Independent agencies don't inspect them so we don't know very much about their size, range, effects, or pre-launch prep.
As for the 'Mutually Assured Destruction' dynamic that held nuclear war at bay for 60 years, including during the Cuban Missile Crisis? Sanger says the dynamics now are "completely different."
Since Ukraine is not a member of NATO, it's not clear if a Russian nuclear attack there would trigger a major US response.
At the 2026 AI for Good Global Summit in Geneva, Tony Maciulis speaks with Tonee Ndungu, a Kenyan entrepreneur who helped launch one of the tech hubs that became a baseline for what is now known as Silicon Savannah. Ndungu explains how growing up with dyslexia and ADHD shaped his focus on inclusion, and why he sees technology as a bridge that can help people move beyond the limits they have been told about themselves.
Artificial intelligence has enormous potential, but only if people can actually access it.
Speaking at the 2026 AI for Good Global Summit, UN General Assembly President Annalena Baerbock argues that AI should not be viewed as a cure-all for global development. Without reliable internet, telecommunications infrastructure, and access to basic technology, even the most advanced AI tools cannot reach the communities that need them most.
Artificial intelligence is becoming an increasingly powerful tool for disaster preparedness and emergency response.
Speaking at the 2026 AI for Good Global Summit in Geneva, Microsoft Vice Chair and President Brad Smith explains how AI combines predictive modeling, satellite imagery, and public data to help governments identify vulnerable communities before disasters strike and respond more quickly when they do.
Graham Platner is out of Maine's Senate race. That may improve Democrats' chance of defeating Republican Susan Collins—but it doesn't guarantee it. In the latest episode of the GZERO Debrief, Eurasia Group US Practice Head Clayton Allen says Democrats may be better off than they were a week ago, but Republicans remain the favorites to hold the Senate seat.