Before the Russian army invaded Ukraine, satellite images showed that Moscow had deployed Iskander missile batteries in Belarus and to its east in Russian territory. There’s no public data on whether Russia has armed any of the Iskanders with nuclear warheads.
Nikolai Sokov, a former Russian diplomat who negotiated arms control treaties in Soviet times, said that nuclear warheads could also be placed on cruise missiles. The low-flying weapons, launched from planes, ships or the ground, hug the local terrain to avoid detection by enemy radar.
From inside Russian territory, he said, “they can reach all of Europe,” including Britain.
Over the years, the United States and its NATO allies have sought to rival Russia’s arsenal of lesser nuclear arms. It started decades ago as the United States began sending bombs for fighter jets to military bases in Belgium, Germany, Italy, Turkey and the Netherlands. Dr. Kühn noted that the alliance, in contrast to Russia, does not conduct field drills practicing a transition from conventional to nuclear war.
Russia-Ukraine War: Key Developments
Russia’s shrinking force. The Pentagon said that Russia’s “combat power” in Ukraine has dipped below 90 percent of its original force. The assessment reflects the significant losses that Russian troops have suffered at the hands of Ukrainian soldiers.
In 2010, Mr. Obama, who had long advocated for a “nuclear-free world,” decided to refurbish and improve the NATO weapons, turning them into smart bombs with maneuverable fins that made their targeting highly precise. That, in turn, gave war planners the freedom to lower the weapons’ variable explosive force to as little as 2 percent of that of the Hiroshima bomb.
The reduced blast capability made breaking the nuclear taboo “more thinkable,” Gen. James E. Cartwright, a vice chairman of the Joint Chiefs of Staff under Mr. Obama, warned at the time. He nonetheless backed the program because the high degree of precision lowered the risk of collateral damage and civilian casualties. But after years of funding and manufacturing delays, the refurbished bomb, known as the B61 Model 12, is not expected to be deployed in Europe until next year, Mr. Kristensen said.
