April 24 - A solar powered plane makes a test flight over San Francisco ahead of a planned cross country flight in May. Lily Grimes reports.
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Blue sky thinking has become reality for Swiss company Solar Impulse.
Hoping to write the next page of aviation history, the firm had this solar powered plane in the air for 16 hours.
This test flight over San Francisco paves the way for a cross America mission planned in early May.
The route is split into five stages starting from the Bay Area and ending in New York.
Solar Impulse aim to pioneer new forms of adventure as well as promote clean technologies.
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