Why a No-Fly Zone for Ukraine Is a Likely No-Go

As Russia’s invasion of Ukraine reaches its seventh day, with heavy bombardment of major cities where resistance on the ground has been fierce, the world’s most powerful military alliance is watching carefully for signs of spillover.

The North Atlantic Treaty Organization, whose members include not just European states but the U.S. and Canada, finds itself facing one of its biggest security challenges in decades. How can it support Ukraine in this moment without getting pulled into the conflict?