NASA conducts the toughest test yet for drone traffic control
 

If you think piloting a drone is tricky, try managing a swarm of them in the sky at once -- it'll be a small wonder if there isn't a collision. However, NASA and the FAA managed just that. They've completed the most complex test yet of a drone traf...

http://www.engadget.com/2016/04/24/n...nagement-test/