After multiple Russian drones violated NATO airspace, Europe faces questions over the alliance’s long-term ability to deal with this growing threat.

After recent drone incursions into Polish and Romanian airspace, NATO has launched Operation Eastern Sentry to strengthen its eastern flank. And can NATO deter future provocations? Just days later, Russian drones crossed into the territory of Romania,

Polish President Karol Nawrocki on Sunday signed a classified decree permitting a permanent NATO troop in Poland as part of Eastern Sentry.

Romania said its F-16 pilots were "very close" to shooting down the Russian drone, but that it eventually exited Romanian airspace.

For more than three years, Ukraine has waged an almost nightly battle against Russian attack drones. NATO on Wednesday got a taste of that fight. Polish authorities said they detected 19 violations of their airspace,

Poland’s military said early Wednesday that it had shot down drones that violated its airspace during a Russian attack on neighboring Ukraine, in what is potentially a major provocation for Europe.

Poland said 19 Russian drones entered its airspace early on Wednesday. After the drones were shot down with NATO assistance, leaders across Europe condemned the incident.

Multiple Russian drones crossed into Poland in what European officials described as a deliberate provocation, causing NATO to send fighter jets to shoot them down.