Nuclear Issues

CSIS’s Project on Nuclear Issues analyze nuclear policy issues including deterrence, escalation, and arms control, and is the leading network of nuclear policy professionals.

Photo: James/Adobe Stock. Image was generated with AI.

Photo: James/Adobe Stock. Image was generated with AI.

High-Altitude Nuclear Explosions: Myths and Reality

What would happen if a nuclear weapon detonated in the sky, not on the ground? Would there be survivors? Would your iPhone work? This briefing dispels common misconceptions about high-altitude nuclear explosions and summarizes the current state of research on the subject.

Brief by Scott Pence and Adam F. Reynolds — July 14, 2025

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Williams

Heather Williams

Director, Project on Nuclear Issues and Senior Fellow, Defense and Security Department
Victor Cha

Victor Cha

President, Geopolitics and Foreign Policy Department and Korea Chair
Joseph Rodgers

Joseph Rodgers

Deputy Director and Fellow, Project on Nuclear Issues

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Peppi DeBiaso

Senior Associate (Non-resident), Missile Defense Project

Non-resident Expert

Ted Harshberger

Senior Associate (Non-resident), Defense-Industrial Initiatives Group

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Christine Michienzi

Senior Associate (Non-resident), Defense-Industrial Initiatives Group

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