The DEFCON Warning System™

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

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Middle East

Fears Grow Over Iran’s Nuclear Program as Tehran Digs a New Tunnel Network

Israeli and American intelligence officials have been watching each day as Iran digs a vast tunnel network just south of the Natanz ...
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Nuclear

Nuclear arsenals expected to grow for first time since Cold War: Report

Nuclear arsenals are expected to grow over the next decade for the first time since the Cold War, a European think tank ...
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Russia

What will the United States do if Russia goes nuclear? Experts say a nuclear response is unlikely but not impossible

It’s a troubling question with no palatable answer: What would President Joe Biden do if Russia used nuclear weapons in the Ukraine ...
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Russia

Russian military moves in the Arctic worry the U.S. and NATO

Russian military moves in the Arctic worry the U.S. and NATO Melissa Rossi ·Contributor June 10, 2022·8 min read In late May, ...
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Ongoing Geointel and Analysis in the theater of nuclear war.

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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.