The announcement was widely expected and has broad support in the country: A recent poll showed that about three-quarters of all Finns support joining the military alliance.
Estonia is host to one of the world's largest annual interactive cybersecurity drills. Russia is always considered the main threat, but this year, the war in Ukraine has only added to the stakes.
The U.S. now believes Ukraine can win, a significant change in thinking, and is rushing in weapons. This raises the risk of widening the conflict, analysts say, and may destabilize the global economy.
One of Europe's poorest countries, Moldova has a separatist region that hosts 1,500 Russian troops. Since the Ukraine war, Moldova has applied to join the EU, even as it keeps a policy of neutrality.
NPR's Leila Fadel talks to NATO Secretary General Jens Stoltenberg about Ukraine's renewed request for weaponry, and the latest predictions on how Russian forces will fight the war in the future.
As Russia's war in Ukraine grinds through its fourth week, President Vladimir Putin's greatest accomplishment so far may be one he never intended: a unified Europe.