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Airship Drones Could Stay Aloft for Days


Airship Drones Could Stay Aloft for Days
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Battery-powered drones have mostly replaced manned aircraft in a range of tasks, from scientific measurements to aerial photography, with one persistent disadvantage – the limit of their power source. A startup company in San Francisco says their airship can do a lot of those tasks while staying in the air much longer. VOA’s George Putic reports.

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