On the sidelines of a NATO defense ministers meeting, he recently spoke of 50,000 to 60,000 additional active-duty soldiers. Consistent with the decision set to be made at the NATO summit. Even if everything goes according to Rutte’s plan, the real test for NATO will only come after the summit, say military leaders and diplomats. The situation would become critical if the U.S. opted to move its weapons and air-defense capabilities out of Europe. And it is likely to be far more challenging than getting the NATO summit over the finish line without a hitch.