A Delta passenger was removed from a flight for refusing to end a phone call. Learn federal rules for cell phone use on planes.
Designed by Northrop Grumman and subsidiary Scaled Composites, the unmanned XRQ-73 features an ultra-quiet propulsion system ...
The XRQ-73, a 1,250-pound drone, uses a mix of electric and jet-fuel propulsion, which is supposed to make it much quieter ...
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