The uneasy balance of global power trembled again Monday when President Donald Trump issued a menacing warning to Vladimir Putin, hours after Russia announced the successful test of its so-called “invincible” nuclear-powered cruise missile — a weapon Western analysts have dubbed the “flying Chernobyl.”

Speaking aboard Air Force One en route to Japan, Trump told reporters that the United States was fully aware of Russia’s test and ready to respond.

“They know we have a nuclear submarine — the greatest in the world — right off their shore,” Trump said. “They’re not playing games with us. We’re not playing games with them either.”

The remark, sharp and deliberate, was a chilling escalation in rhetoric between Washington and Moscow, coming as the world faces one of the most volatile geopolitical climates since the Cold War.

Putin’s “Flying Chernobyl”

On Sunday, Putin appeared on Russian state television dressed in military fatigues, boasting of a 15-hour, 8,700-mile test flight of the Burevestnik nuclear-powered missile, a weapon he described as “unique” and “unmatched in the world.”

“We need to identify potential uses and begin preparing the infrastructure for deploying this weapon in our armed forces,” Putin said, smirking as Russian generals nodded in approval.

The Burevestnik, known to NATO as the SSC-X-9 Skyfall, is believed to be capable of carrying a nuclear warhead over intercontinental distances while evading Western air defenses. Because the missile is powered by a miniature nuclear reactor, it can remain airborne for hours or even days — a capability that horrifies arms control experts.

General Valery Gerasimov, Russia’s top military commander, hailed the missile as “a tiny flying Chernobyl,” referencing the 1986 nuclear disaster. The description, intended as a boast, only underscored the potential danger.

“This is one more science fiction weapon that is going to be destabilizing and hard to address in arms control,” warned Jeffrey Lewis, a nuclear nonproliferation expert at Middlebury College.

Trump Fires Back

Trump, who has cultivated an uneasy relationship with Putin marked by both rivalry and reluctant diplomacy, dismissed the Russian test as “provocation theater.” But his warning — “We’ve got nukes off your shore” — marked one of his most direct public threats toward Russia in years.

“We test missiles all the time,” Trump added. “But we don’t need to go 8,000 miles. We’ve got what we need, right where we need it.”

The president’s comments came just a day after a planned meeting between U.S. and Russian defense officials collapsed, deepening tensions between the two nuclear powers.

Trump also used the moment to rebuke Putin for his ongoing war in Ukraine.

“He ought to get the war ended,” Trump said. “A war that should have taken one week is now in its fourth year. That’s what he ought to do instead of testing missiles.”

Ukraine Reacts: “More Pressure Needed”

In Kyiv, Ukrainian President Volodymyr Zelensky praised Trump’s latest sanctions on Russia but urged him to go further.

“If there are no negotiations, there will be escalation anyway,” Zelensky told Axios. “If Putin doesn’t stop, we need something to stop him — sanctions, yes, but also long-range missiles.”

Zelensky’s plea comes as Russian forces intensify attacks along Ukraine’s eastern front, and Western intelligence warns that Moscow’s latest weapons tests may be designed to signal defiance, not readiness.

Experts Fear a New Nuclear Arms Race

The Burevestnik test has reignited fears of a new nuclear arms race — one that blurs the line between deterrence and disaster. The missile’s design, powered by a miniature reactor, is considered so risky that several early tests reportedly ended in crashes that scattered radioactive debris across northern Russia.

“It’s literally flying radiation,” one European defense analyst said. “Even testing it is reckless. If that reactor fails, you have a nuclear incident — not a weapon, a catastrophe.”

In 2019, a similar test explosion killed five Russian scientists, prompting a radiation spike detected hundreds of miles away. The Kremlin dismissed reports of contamination as “Western propaganda.”

Now, with Putin flaunting a successful launch, arms control advocates warn that the last remaining nuclear treaty between the U.S. and Russia — New START — is on life support.

“This is a moment of enormous danger,” said Dr. Andrea Collins, a former UN disarmament advisor. “If both sides start normalizing the development of experimental nuclear-powered weapons, the safeguards built since the 1980s will unravel.”

A Return to the Brink

Trump’s fiery language has once again pushed the U.S.–Russia relationship into treacherous territory. While he insists his threats are about deterrence, critics warn they risk miscalculation — especially as Russia’s state media portrays the Burevestnik test as a triumph of defiance.

For now, Putin appears emboldened. But Trump’s warning — terse, unmistakable, and delivered midair — may be the clearest sign yet that both nations are moving closer to the edge of confrontation.

“We’re ready,” Trump said, before closing his folder and walking toward his cabin on Air Force One.

The engines roared as the president’s plane ascended toward Japan — leaving behind a world once again haunted by the specter of nuclear brinkmanship.