Putin threatens to resume nuclear weapons testing amid Ukraine conflict

Vladimir Putin stood before the Valdai Discussion Club, an annual gathering close to the Kremlin, and raised the nuclear stakes once more. The Russian president suggested his country might walk back its ratification of the Comprehensive Nuclear Test Ban Treaty—a 1996 accord that has never formally entered force because eight key nations, including the United States, have not ratified it. Putin's reasoning was clinical: new weapons systems need their warheads tested, and Russia's scientists had made this clear. Whether tests were truly necessary remained an open question in his mind, but the door, he implied, was not closed.

The threat arrived at a moment of particular tension. Just days earlier, Margarita Simonian, the influential director of the state television network RT, had publicly advocated for detonating an atomic bomb in an uninhabited region of Siberia as a warning to the West about the costs of continued support for Ukraine. The Kremlin's spokesman, Dmitri Peskov, had quickly denied any such intention. But Putin's remarks at Valdai suggested the nuclear card remained very much in play—a reminder to Western capitals that they were dealing with a nuclear power, one growing impatient with the pace and scope of military aid flowing to Kyiv.

Putin used the occasion to announce that Russia had completed development of the Burevestnik, a nuclear-powered cruise missile that can fly with indefinite range, loitering like a nuclear drone until it finds its target. This weapon was the most troubled of six strategic systems he had unveiled to the world in 2018 with great fanfare and considerable skepticism from military analysts. The others—the hypersonic Tsirkon and Kinjal missiles, the heavy intercontinental ballistic Sarmat, the nuclear torpedo Poseidon, and an unspecified laser weapon—were already operational or nearing it. Only legal and bureaucratic details remained, Putin said, before the Burevestnik could move into production.

The nuclear posturing served a larger purpose in Putin's worldview. He framed the Ukraine conflict not as a territorial grab but as a civilizational struggle, a response to what he saw as the West's arrogant treatment of Russia since the Soviet Union's collapse in 1991. He recalled offering to join NATO in a 2000 BBC interview, only to be rebuffed. He accused the West of backing what he called an unconstitutional coup in Kyiv in 2014—the event that had set the stage for his annexation of Crimea and, ultimately, the full-scale invasion of 2022. The war, in his telling, was not something Russia had provoked but something it was trying to end.

Yet even as Putin wielded the nuclear threat, he was careful to maintain a boundary. He restated Russia's official nuclear doctrine: the bomb would be used only in response to nuclear attack or an existential threat to the state. Tactical nuclear weapons, he said, made no sense in Ukraine. This was not new rhetoric—he had said much the same at the Valdai forum the previous year. The message was calibrated: Russia possessed overwhelming nuclear force and would not hesitate to remind the world of it, but neither would it stumble into nuclear war over Ukraine.

The timing of Putin's remarks was pointed. On the same day, Ukrainian President Volodymyr Zelensky was meeting with leaders of the European Political Community in Granada, Spain—a gathering of nations united in their support for Kyiv. The contrast was deliberate: while the West coordinated its backing for Ukraine, Russia was reminding everyone of the ultimate stakes. The threat to resume nuclear testing was, in essence, a warning about the limits of Western patience and resources. It was also a signal that Russia's nuclear arsenal, inherited from the Cold War and now numbering roughly 6,250 deployed warheads (with the U.S. holding a similar number), remained the ultimate guarantor of Russian power in a world where conventional military superiority was no longer assured.