A swarm of 150 drones buzzed over Maroon 5 singer Adam Levine’s head during this year’s Super Bowl half time show, spelling out the words “One Love.”

It was a dazzling display of drone technology — and military developers in the United States and United Kingdom are increasingly interested in using something similar, but with a very different goal in mind: to surround enemy aircraft, confusing them and forcing them out of the sky.