Swiss pilots to attempt first around-the-world solar flight

Two Swiss pilots are expected to embark on Monday morning on the first attempt to fly around the world in a plane propelled only by the sun. Bertrand Piccard and André Borschberg will take turns piloting the single seater Solar Impulse 2 for 21,747 miles (35,000km) over 12 legs, including gruelling five- to six-day stints across the Atlantic and Pacific oceans. The entire journey will take five months.

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