It’s very unusual for drones and planes to collide, though when they do, it’s not great news for anyone involved. In test conditions, drones have caused serious damage to planes. University of Dayton scientists flew a 2.1lb (1kg) DJI Phantom 4 drone into the wing of an airplane, traveling at 238 miles per hour. In the blink of an eye—three-hundredths of a second—the drone had smashed into the plane’s wing, “like a spoon through chocolate mousse.” If it had gone soaring into the front windscreen, or even into the engine, it would have done still more damage.

Increasingly, criminals have used drones to bolster their efforts, leaving British police forced to divert resources to “new forensic intelligence forces” dedicated to tackling drone-related crimes. How quickly they can find the culprits here remains to be seen—though, almost a whole day on, thousands of passengers are waiting with baited breath.

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