NATO air defense intercepts Iranian ballistic missile heading toward Turkish airspace — first direct NATO defensive engagement of the conflict

NATO integrated air defense systems intercepted an Iranian ballistic missile that was tracking toward Turkish airspace on March 4. This represents the first direct defensive engagement by the alliance in the Iran conflict. Turkey is the only NATO member with a direct land border with Iran (530km) and hosts Incirlik Air Base with approximately 50 B61 nuclear bombs. The intercept raises immediate questions about whether Article 5 consultations will be triggered — a BM targeting or transiting NATO member airspace crosses a qualitatively different threshold from strikes on member-state overseas bases (e.g., RAF Akrotiri). Combined with NATO’s five-domain force posture adjustments announced March 1, the alliance is transitioning from monitoring to active defense.