for The Hill

U.S. allies will converge in Washington next month for this year’s NATO summit, which also marks the 75th anniversary of the most successful collective security pact in modern times.

Amid the prosaic business of managing a 32-nation alliance, one urgent question will hover over the gathering: Are the transatlantic partners doing enough to prevent Russia from snuffing out Ukraine’s sovereignty?

If they fail, it won’t just be a tragedy for Ukraine. Its defeat or dismemberment would reward Vladimir Putin’s aggression and whet his appetite for regaining control over other former Soviet possessions, such as Armenia, Moldova and the Baltic states.