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Here’s what you need to know:

“I believe in NATO,” Trump says

• President Trump strongly recommitted his support for the military alliance today, saying on the second and final day of a summit meeting in Brussels that members had agreed to increases in military spending. But he offered no specifics, and President Emmanuel Macron of France refuted the claim. We have live updates.

“The United States was not being treated fairly, but now we are,” the president said at a news conference after NATO leaders held an emergency meeting to address his complaints.

On Wednesday, Mr. Trump again demanded that allies meet a commitment to raise their military budgets, and then surprised them by saying they should double that spending target. He also criticized Germany for being a “captive” of Russia’s energy supply. (Our fact-check suggests otherwise.)

The president did, however, join other NATO leaders in signing a statement that harshly criticized Russia, days before he is to meet with its leader, Vladimir Putin.