Solar Impulse 2 aircraft readying for 5,000 mile trip without gas

Monday, May 25, 2015 - 12:00 in Astronomy & Space

Amy R. ConnollyNANJING, China, May 25 (UPI) -- The Solar Impulse 2, a completely solar-powered aircraft, is set to make its most difficult leg of its around-the-world journey.

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