“Russia has violated Estonian airspace four times already this year, which is unacceptable in itself, but today’s violation, during which three fighter jets entered our airspace, is unprecedentedly brazen,” he told reporters in Tallinn. The Estonian violation follows closely on the heels of another Russian provocation in Poland. NATO jets intercepted several, but others flew deep enough to cause alarm in multiple Polish provinces. “Earlier today, Russian jets violated Estonian airspace. Without transponders and flight plans, Russian military aircraft can pose direct threats to civilian airliners traversing the busy Baltic flight corridors.