For 17 days last year, unidentified drones swarmed an area in Virginia that is home to a military base and other sensitive intelligence sites. WSJ’s Gordon Lubold looked into why it was so difficult for U.S. officials to stop them. 

Further Reading:

-Mystery Drones Swarmed a U.S. Military Base for 17 Days. The Pentagon Is Stumped. 

Further Listening:

-How Ukraine Built a Weapon to Control the Black Sea 

-Cheap Drones Are Transforming the Battlefield 

Learn more about your ad choices. Visit megaphone.fm/adchoices