(FILES) This handout file photo from Solar Impulse 2 taken on May 21, 2016 shows ground crew members towing the experimental solar-powered aircraft to the runway in preparation for takeoff in Tulsa, Oklahoma. A solar-powered plane set to fly from Ohio to Pennsylvania on May 24, 2016 delayed its departure to inspect possible damage due to a mishap, organizers said. The Solar Impulse 2, set to be piloted by Swiss national Bertrand Piccard, was scheduled to fly out of Dayton International Airport and head to Lehigh Valley International Airport near the city of Allentown at 1000 GMT. / AFP PHOTO / Solar Impulse 2 / JEAN REVILLARD / REZO