Nuclear experts are trained to think the unthinkable. So, here is an unthinkable scenario that might actually happen in real life: The battle over Ukraine drags on. From both the European Union and the United States, fresh weapons and other supplies continue to enter into Ukraine and allow the Ukrainian …

Russia’s Invasion Could Unleash Forces the Kremlin Can’t Control Russian forces have struck targets across Ukraine and seized key facilities and swaths of territory. The Ukrainian military is no match for this Russian juggernaut. Although some reports suggest Ukrainian troops have rebuffed attacks in certain parts of the country, it …

Russia’s strategic concerns regarding the post-Cold War European security architecture, as expressed in the two treaty drafts published by Moscow in December 2021, may be seen as legitimate, or at least deserving to be heard and taken seriously. The new lines of argument expressed in Vladimir Putin’s Feb. 21 and …