Source: Voice of America (VOA) – voanews.com
By George Putic
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.
Source: Voice of America (VOA) – voanews.com