Solar-powered plane lands in California after risky flight across Pacific Ocean

Solar Impulse 2 flies over San Francisco, Saturday, April 23, 2016. The solar-powered airplane, which is attempting to circumnavigate the globe to promote clean energy and the spirit of innovation, arrived from Hawaii after a three-day journey across the Pacific Ocean. (AP Photo/Noah Berger)

The solar-powered airplane, which is attempting to circumnavigate the globe to promote clean energy and the spirit of innovation, arrived from Hawaii after a three-day journey across the Pacific Ocean. AP

Solar Impulse 2 flies over San Francisco, Saturday, April 23, 2016. The solar-powered airplane, which is attempting to circumnavigate the globe to promote clean energy and the spirit of innovation, arrived from Hawaii after a three-day journey across the Pacific Ocean. (AP Photo/Noah Berger)

The solar-powered airplane, which is attempting to circumnavigate the globe to promote clean energy and the spirit of innovation, arrived from Hawaii after a three-day journey across the Pacific Ocean. AP

Solar Impulse 2 flies over San Francisco, Saturday, April 23, 2016. The solar-powered airplane, which is attempting to circumnavigate the globe to promote clean energy and the spirit of innovation, arrived from Hawaii after a three-day journey across the Pacific Ocean. (AP Photo/Noah Berger)

The Solar Impulse 2 landed in Hawaii in July and was forced to stay in the islands after the plane's battery system sustained heat damage on its trip from Japan. AP

Solar Impulse 2 flies over San Francisco, Saturday, April 23, 2016. The solar-powered airplane, which is attempting to circumnavigate the globe to promote clean energy and the spirit of innovation, arrived from Hawaii after a three-day journey across the Pacific Ocean. (AP Photo/Noah Berger)

The plane's ideal flight speed is about 28 mph, though that can double during the day when the sun's rays are strongest. AP

Solar Impulse 2 flies over San Francisco, Saturday, April 23, 2016. The solar-powered airplane, which is attempting to circumnavigate the globe to promote clean energy and the spirit of innovation, arrived from Hawaii after a three-day journey across the Pacific Ocean. (AP Photo/Noah Berger)

The plane's wings, which stretch wider than those of a Boeing 747, are equipped with 17,000 solar cells that power propellers and charge batteries. AP

Pilot Bertrand Piccard emerges from Solar Impulse 2 at Moffett Field in Mountain View, Calif., on Saturday, April 23, 2016, after crossing the Pacific Ocean. The solar-powered airplane landed in California on Saturday, completing a risky, three-day flight across the Pacific Ocean as part of its journey around the world. (AP Photo/Noah Berger)

Pilot Bertrand Piccard emerges from Solar Impulse 2 at Moffett Field in Mountain View, Calif., after crossing the Pacific Ocean. The solar-powered airplane landed in California on Saturday, completing a risky, three-day flight across the Pacific Ocean as part of its journey around the world. AP

Solar Impulse 2 pilots Bertrand Piccard, left, and Andre Borschberg celebrate after Piccard landed their solar-powered plane at Moffett Field in Mountain View, Calif., on Saturday, April 23, 2016. The solar-powered airplane landed in California on Saturday, completing a risky, three-day flight across the Pacific Ocean as part of its journey around the world. (AP Photo/Noah Berger)

Solar Impulse 2 pilots Bertrand Piccard and Andre Borschberg celebrate after Piccard landed their solar-powered plane at Moffett Field in Mountain View, Calif. AP

Solar Impulse 2 lands at Moffett Field in Mountain View, Calif., after crossing the Pacific Ocean on Saturday, April 23, 2016. The solar-powered airplane landed in California on Saturday, completing a risky, three-day flight across the Pacific Ocean as part of its journey around the world. (AP Photo/Noah Berger)

Solar Impulse 2 lands at Moffett Field in Mountain View, Calif. AP

Solar Impulse 2 pilot Bertrand Piccard looks out his cockpit window shortly after landing at Moffett Field in Mountain View, Calif., on Saturday, April 23, 2016. The solar-powered airplane landed in California on Saturday, completing a risky, three-day flight across the Pacific Ocean as part of its journey around the world.(AP Photo/Noah Berger)

Solar Impulse 2 pilot Bertrand Piccard looks out his cockpit window shortly after landing at Moffett Field in Mountain View, Calif. AP

Solar Impulse 2 pilots Bertrand Piccard, second from left, and Andre Borschberg, center, shake hands as they pose for a photo at Moffett Field in Mountain View, Calif., on Sunday, April 24, 2016, after crossing the Pacific Ocean on Saturday. The solar-powered airplane landed in California on Saturday, completing a risky, three-day flight across the Pacific Ocean as part of its journey around the world. (AP Photo/Olga R. Rodriguez)

Solar Impulse 2 pilots Bertrand Piccard and Andre Borschberg shake hands as they pose for a photo at Moffett Field in Mountain View, Calif. AP


Updated Date: Apr 25, 2016 08:45 AM

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