An experimental solar-powered plane, Solar Impulse, approaches to make a night landing at Rabat airport, Morocco, Tuesday, June 5, 2012 after a 20-hour trip from Madrid in the first transcontinental flight by a craft of its type. (AP Photo/Abdeljalil Bounhar)

Associated Press
An experimental solar-powered plane, Solar Impulse, approaches to make a night landing at Rabat airport, Morocco, Tuesday, June 5, 2012 after a 20-hour trip from Madrid in the first transcontinental flight by a craft of its type. (AP Photo/Abdeljalil Bounhar)
An experimental solar-powered plane, Solar Impulse, approaches to make a night landing at Rabat airport, Morocco, Tuesday, June 5, 2012 after a 20-hour trip from Madrid in the first transcontinental flight by a craft of its type. (AP Photo/Abdeljalil Bounhar)
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