Poland, NATO’s eastern frontline state, is facing its most serious security challenge in decades. At least 19 Russian drones violated Polish airspace on Sept. 10 during a large-scale attack on Ukraine, prompting Warsaw to invoke NATO’s Article 4 and convene emergency consultations. Western officials have warned of the risk of a direct confrontation with Russia in the coming years, but are Poland — and NATO — truly prepared for such escalation? Reporter and video editor: Ray Baseley