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Solar-powered planes still a long way from carrying passengers

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The Solar Impulse 2, a zero-fuel aircraft, has completed a three-day journey across the Pacific Ocean, but electric flight may still be among the technologies that are furthest from becoming practical.

Washington

BERTRAND Piccard made headlines last Saturday when he glided a solar-powered plane onto Moffett Airfield in California after a three-day journey across the Pacific Ocean. It's the most recent stop in an around-the-world trip that began in Abu Dhabi last spring and is intended