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Associated Press
The aircraft Solar Impulse is prepared for the second leg of the 2013 Across America mission, early Wednesday, May 22, 2013, at Sky Harbor International Airport in Phoenix. The solar powered aircraft is scheduled to land at Dallas/Fort Worth International Airport on Thursday May 23. The plane's creators, Bertrand Piccard and Borschberg, said the trip is the first attempt by a solar airplane capable of flying day and night without fuel to fly across America. (AP Photo/Matt York)

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