The number of serious airspace violations in Europe has spiked this month, including by Russian warplanes. NATO’s top military officer decidesNATO’s supreme commander in Europe, U.S. Gen. Alexus Grynkewich, manages airspace violations. If they ignore them, it risks inviting ever-escalating Russian violations of allied airspace,” he said. “Opening fire is really, really, really, really the last resort,” he said. And so far, the United States has not sent military equipment to help counter the airspace violations.