The U.S. Navy Turned Its Drone Helicopter Into a Mine-Detector - War Is Boring
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Spanish police trial 'mega drone' that can travel up to 80mph | World News | Sky News
Ehang's Drone Copter Aims To Fly You Around -- CES 2016 - YouTube
Chinese arms firm ready to deliver indigenous helicopter drones - Global Times
VAPOR All-electric Helicopter Unmanned Aircraft System - YouTube