Solar-powered plane's latest leg: Oklahoma to Ohio
The Solar Impulse 2's wings, which stretch wider than those of a Boeing 747, are equipped with 17,000 solar cells that power propellers and charge batteries.
The crew was forced to stay in Oahu, Hawaii, for nine months after the plane's battery system sustained heat damage on its trip from Japan.
The solar project began in 2002 to highlight the importance of renewable energy and the spirit of innovation.