Swiss adventurer Bertrand Piccard welcomes the Solar Impulse 2 (Si2),
| By Reuters
Swiss adventurer Bertrand Piccard, holding a historical model of a plane designed by the Wright brothers, welcomes the Solar Impulse 2 (Si2), piloted by Andre Borschberg, at Dayton International Airport, Ohio, May 21, 2016. Andre Borschberg, Jean Revillard, Christophe Chammartin/SI2/Handout via Reuters
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