Ukrainian officials said on Friday that fire at the largest nuclear power plant in Europe has been extinguished, but that the facility is now under Russian control after fighting. In a later development at a Friday news conference, the chief of the U.N.’s atomic watchdog said there had been no …

In April 1941, four years before he was to become President and eight months before the United States entered World War II, Senator Harry Truman of Missouri reacted to the news that Germany had invaded the Soviet Union: “If we see that Germany is winning the war, we ought to …

Surprise and horror have defined the reaction to the Russian military intervention in Ukraine. That’s likely because although the intervention has followed the contours of a modern land war, it has also marked a break with the past in a number of ways. The world has become used to military …