Solar Plane's Harrowing 120-Hour Flight Begins

One pilot, five days over the Pacific, no fuel

The First Solar Plane Flying Around the World

Solar Impulse, a plane powered entirely by the sun, has departed on a harrowing five-day journey over the Pacific Ocean. It's a one-way ticket from Japan to Hawaii. There's no turning back for this one-seater plane that cruises at just 40 miles an hour. 

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