Romania summoned Russia's ambassador to Bucharest Sunday after it became the second NATO country in less than a week to report a Russian drone incursion in its airspace.

The big picture: Tensions have been heightened in Eastern Europe since Poland reported that NATO and Polish jets scrambled to intercept Russian drones that breached its airspace last week during Russia's war on Ukraine, and an EU official on Sunday denounced the latest incursion as a "reckless escalation." • NATO strengthened its air defense and launched operation "Eastern Sentry" on Friday to bolster military activity along Europe's eastern flank, with support from France, Germany, the U.K. and Denmark.

Driving the news: Two F-16 jets in eastern Romania were "scrambled on an Air Policing mission to monitor the air sit

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