The experimental aircraft Solar Impulse HB-SIA, with Solar Impulse's founder, chairman and pilot Bertand Piccard onboard is landing at the airbase in Payerne, Switzerland, July 24, 2012. Solar-powered and zero fuel aircraft Solar Impulse made an intercontinental trip with destinations in Morocco, Spain and France, with a 63.40 metres wingspan, powered only by solar energy. [Photo/CFP]
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