VIENNA — Latvia’s minister of defense has resigned following a renewed incursion of Ukrainian drones into the country’s airspace, where they hit an empty fuel depot. The incident marks the latest in a series of Baltic NATO airspace violations by misguided Ukrainian drones sent to strike Russian targets far away from Kyiv. On May 7, two drones entered Latvia from Russian airspace, hitting a fuel depot. Nobody was injured. As early as March of this year, there had been incidents of Ukrainian