Crew members of Solar Impulse project check the HB-SIA experimental aircraft before taking off at Barajas airport in Madrid, Spain, Tuesday, June 5, 2012. The solar-powered airplane arrived in Madrid ... more 
Crew members of Solar Impulse project check the HB-SIA experimental aircraft before taking off at Barajas airport in Madrid, Spain, Tuesday, June 5, 2012. The solar-powered airplane arrived in Madrid on May 25, 2012 from Payerne, Switzerland, and now goes on to Rabat, Morocco on its first transcontinental trip. The mission is described as the final dress rehearsal for a round-the-world flight with a new and improved aircraft in 2014.(AP Photo/Alberto Di Lolli) less 
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Associated Press | Photo By Alberto Di Lolli
Tue, Jun 5, 2012 5:56 AM EDT