Global crises abound—escalating war in Yemen, potential famine in Afghanistan, rising tensions on the Korean Peninsula, and uncertain prospects for a U.S. return to the Iran anti-nuclear deal. All of these challenges require skillful diplomacy, and that urgently applies to the situation in Ukraine. As PresidentJoe Biden has ordered 8,500 …

Russian President Vladimir Putin appears to be preparing to launch an invasion of Ukraine, with more than 100,000 troops positioned around the country. Certainly, the U.S. believes that’s the case and President Joe Biden has warned Ukrainian President Volodymyr Zelenskyy that an attack could come in February. But Russia denies …

The helicopter cut through the gray sky, following the path of the razor-wire fence below it. Lt. Col. Uiry Trubachov, of Ukraine’s Border Guard Service, squinted up at the chopper. “Those are Russians,” he said. Before Russia’s invasion and annexation of Ukraine’s Crimean Peninsula in 2014, the border barriers didn’t …