The DEFCON Warning System™

The World’s Only Public Nuclear Threat Advisory System. Independent, real-time analysis of global nuclear tensions. Since 1984.

DEFCON 4 - Blue

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Middle East

Joe Biden Inches Toward War with Iran, Makes Israel Full Military Partner

Preparing for any potential war against Iran, the Biden administration has formally elevated Israel in military planning. Israel’s changed status comes as ...
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Announcements

DEFCON Warning System – Update 1/1/23

This is the DEFCON Warning System. Alert status for 9 P.M. UTC, Sunday, January 1st, 2023.  Condition code is Green.  DEFCON 5. ...
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Announcements

DEFCON Warning System Digest – Ask Me Anything 2022

Our annual Ask Me Anything where the Director of The DEFCON Warning System takes all questions (within reason)!
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Nuclear

Just How Radioactive Are Low-Yield Nuclear Weapons?

Russian President Vladimir Putin’s repeated nuclear threats against member-states of the North Atlantic Treaty Organization (NATO) for interfering in Russia’s invasion, occupation, ...
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© 2026 The DEFCON Warning System. Established 1984.

The DEFCON Warning System is a private intelligence organization which has monitored and assessed nuclear threats by national entities since 1984. It is not affiliated with any government agency and does not represent the alert status of any military branch. The public should make their own evaluations and not rely on the DEFCON Warning System for any strategic planning. At all times, citizens are urged to learn what steps to take in the event of a nuclear attack.