Ukraine’s biggest nuclear plant, which is surrounded by Russian troops, has lost all external power needed for vital safety systems for the second time in five days, the head of the U.N.’s nuclear watchdog said Wednesday, calling it a “deeply worrying development.” The warning from International Atomic Energy Agency Director-General …

The U.S.-led NATO alliance will agree this week to a plan for ramping up munitions and weapons production to replenish stockpiles after months of arms shipments to Ukraine, NATO’s top official said Tuesday. Secretary-General Jens Stoltenberg, speaking on the eve of a two-day defense ministers conference in Brussels, also said …

Cracks have emerged in their marriage of convenience, but the two autocrats are in it for the long haul. Anyone who has been in a relationship knows there are good days and not so good days. While trust and respect are the bedrock of healthy partnerships, transactional and even toxic …