FILE - In this April 23, 2016 file photo, Solar Impulse 2 lands at Moffett Field in Mountain View, Calif., completing the leg of its journey from Hawaii in its attempt to circumnavigate the globe. A solar-powered airplane that landed in Oklahoma last week is headed to Ohio on the latest leg of its around-the-world journey.  The Swiss-made Solar Impulse 2 took off from Tulsa International Airport about 5 a.m. Saturday, May 21, 2016,  with a destination of Dayton, Ohio. The flight was expected to take about 18 hours.(AP Photo/Noah Berger, File) Photo: AP / AP2016