NATO will “continue to take all necessary measures to defend NATO territory, General Alexus G. Grynkewich, the alliance’s Supreme Allied Commander for Europe, said in a statement. The two leaders discussed “the outcomes of (Zelensky’s) visit to the United States and the security of Poland, Ukraine, and all of Europe,” according to a post to X by Tusk. Poland has routinely scrambled jets in response to Russian attacks on western Ukraine, though they have rarely entered its territory. Does this Russian incursion into NATO territory amount to a purposeful test of NATO’s responses? But all the same, a Russian missile just landed inside NATO, and that is unquestionably a big deal.