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Coming to terms with the nuclear risks of the Ukraine war

The US and Russia both have integrated doomsday weapons into conventional war plans. The risk is low but it isn't zero.

Analysis | Europe
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If you are frightened by the current crisis in Ukraine, you are having a rational response.

We are closer to war between the two largest nuclear-armed states than we have been since the early 1980s. The United States and Russia are not in direct combat, and President Biden has wisely ruled out sending U.S. forces to Ukraine. Nor would either state intentionally launch a "bolt-out-of-the-blue" nuclear attack.

But the United States and Russia are in conflict. While they are carefully choosing which instruments of coercion to apply, they both have developed doctrines of “integrated deterrence” over the past 10 years that integrate nuclear weapons into the coercive options they employ.

This is meant to strengthen deterrence — but it also blurs the firebreak between nuclear, cyber, conventional, and economic weapons. Any miscalculation or misunderstanding could, in the heat of battle or on the brink of defeat, result in the use of one or more nuclear weapons. War games conducted over decades teach us that there is no logical termination point once nuclear war begins.

At least some in Russia also favor using nuclear weapons first in a conflict and some favor using them in a strategy known as “escalate to de-escalate.” That is, if Russia is losing a conventional war against the West, it would use a nuclear weapon first to signal the seriousness of the situation, and force the West to back down. That, of course, is unlikely to be the Western response.

Still, even given those factors, the chance that the conflict will escalate to the nuclear level is low. But it is not zero. That should terrify us.

Most Americans have not thought much about nuclear weapons since the end of the Cold War. But Putin has. He referenced them twice in his speech this week announcing his “special military operation.”

Putin made an explicit nuclear threat to all who dare oppose him, the first in many years issued by a leader of a nuclear-armed nation not named Donald Trump or Kim Jong-un.

“Even after the dissolution of the USSR and losing a considerable part of its capabilities, today’s Russia remains one of the most powerful nuclear states,” he said. “Moreover, it has a certain advantage in several cutting-edge weapons. In this context, there should be no doubt for anyone that any potential aggressor will face defeat and ominous consequences should it directly attack our country.”

The second reference was part of his explanation for why he had to invade Ukraine. “The showdown between Russia and these forces cannot be avoided. It is only a matter of time,” he warned. “They are getting ready and waiting for the right moment. Moreover, they went as far as aspire to acquire nuclear weapons. We will not let this happen.”

Ukraine does not have, nor can it build, nuclear weapons. The charge is absurd. But like claims that Iraq had nuclear weapons or that Iran was racing to get them, he cited the nuclear threat as justification for preemptive action. “Russia cannot feel safe, develop, and exist while facing a permanent threat from the territory of today’s Ukraine,” he said. “We have to take bold and immediate action.”

The leaders of the international nuclear abolition group, Global Zero, said in a statement Thursday, “In a world bristling with thousands of nuclear weapons ready to launch at a moment’s notice, the stakes of any conflict involving nuclear-armed governments are already unacceptably high. Our urgent focus must be on reducing these risks, not further exacerbating them.”

If and when we get through this crisis, we need a long, deep discussion of how we got here. We need to rethink our policies of the past 20-30 years. How could we have prevented this crisis? What could we have done to reduce the nuclear risks? Did we squander our "unipolar moment”?

Finally, why didn’t we act on the call issued in 2007 by George Shultz, William Perry, Sam Nunn and Henry Kissinger? They warned that unless we moved step by step to reduce and eventually eliminate nuclear weapons, we would “be compelled to enter a new nuclear era that will be more precarious, psychologically disorienting, and economically even more costly than was Cold War deterrence.”

We are now in that world.


GRABLE EVENT - Part of Operation Upshot-Knothole, was a 15-kiloton test fired from a 280-mm cannon on May 25, 1953 at the Nevada Proving Grounds. Frenchman's Flat, Nevada - Atomic Cannon TestHistory's first atomic artillery shell fired from the Army's new 280-mm artillery gun. Hundreds of high ranking Armed Forces officers and members of Congress are present. The fireball ascending. (Photo: US Army)
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Analysis | Europe
Dan Caine
Top photo credit: Secretary of War Pete Hegseth and Chairman of the Joint Chiefs of Staff U.S. Air Force Gen. Dan Caine conduct a press briefing on Operation Epic Fury at the Pentagon, Washington, D.C., March 4, 2026. (DoW photo by U.S. Navy Petty Officer 1st Class Alexander Kubitza)

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Gen. Dan Caine’s formulation of American war aims in Iran is remarkable not because it is bellicose, but because it is strategically incoherent.

In a press conference Tuesday morning, the chairman of the Joint Chiefs of Staff did not describe a limited campaign to suppress missile fire, blunt Iran’s naval threat, or even impose a severe but bounded setback on Tehran’s coercive instruments. He described a campaign against Iran’s “military and industrial base” designed to prevent the regime from attacking Americans, U.S. interests, and regional partners “for years to come.” In an earlier briefing he put the objective similarly: to prevent Iran from projecting power outside its borders. Rather than the language of a discrete coercive operation, this describes a war against a state’s capacity to regenerate power.

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UAE President Sheikh Mohammed bin Zayed al-Nahyan receives Saudi Crown Prince Mohammed bin Salman at the Presidential Airport in Abu Dhabi, United Arab Emirates November 27, 2019. WAM/Handout via REUTERS

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On Sunday, U.S. Ambassador to the U.N. Mike Waltz told ABC News that Arab Gulf states may soon step up their involvement in the U.S.-Israeli war on Iran. “I expect that you'll see additional diplomatic and possibly military action from them in the coming days and weeks,” Waltz said.

Then, on Monday morning, Sen. Lindsey Graham (R-S.C.) slammed Saudi Arabia for staying out of the war even as “Americans are dying and the U.S. is spending billions” of dollars to conduct regime change in Iran. “If you are not willing to use your military now, when are you willing to use it?” Graham asked. “Hopefully this changes soon. If not, consequences will follow.”

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Top image credit: Iranian army military personnel stand at attention under a banner featuring an image of an Iranian-made unmanned aerial vehicle (UAV) during a military parade commemorating the anniversary of Army Day outside the Shrine of Iran's late leader Ayatollah Ruhollah Khomeini in the south of Tehran, Iran, on April 18, 2025. (Photo by Morteza Nikoubazl/NurPhoto)

Why Tehran may have time on its side

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A provocative calculus by Anusar Farrouqui (“policytensor”) has been circulating on X and in more exhaustive form on the author’s Substack. It purports to demonstrate a sobering reality: in a high-intensity U.S.-Iran conflict, the United States may be unable to suppress Iranian drone production quickly enough to prevent a strategically consequential period of regional devastation.

The argument is framed through a quantitative lens, carrying the seductive appeal of mathematical precision. It arranges variables—such as U.S. sortie rates and degradation efficiency against Iranian repair cycles and rebuild speeds—to suggest a "sustainable firing rate." The implication is that Iran could maintain a persistent strike capability long enough to exhaust American political patience, forcing Washington toward a premature declaration of success or an unfavorable ceasefire.

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