Putin is testing NATO's limits

Russia has repeatedly tested NATO's resolve with drone flights over Poland, fighter jet incursions into Estonian airspace, and surveillance activities in the Baltic Sea, including the most recent incident - https://www.theguardian.com/world/2025/sep/21/german-jets-scrambled-after-russian-military-plane-flies-over-baltic-sea

NATO's recent consultations under Article 4 show that these provocations are no longer being treated as routine incidents...