DARPA green lights Aurora, Bell for next phase in SPRINT X-plane competition
Northrop Grumman and Piasecki Aircraft Corporation have been eliminated from a DARPA effort to design, develop and fly a high-speed vertical takeoff and landing X-plane.
Don’t Launch Drones Or Blimps As Emergency Coms Relays After Disaster
Launching drones/blimps as communication relays after disaster would do more harm than good, say AT&T, Sprint, & APCO: http://politi.co/MiSVqJ SydneyFreedberg
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How drones can navigate without GPS
Absolute positioning is critical in contested and denied environments.