Solar Impulse Project: flying without fuel

http://www.solarimpulse.com/

https://www.facebook.com/solarimpulse

https://www.youtube.com/user/SolarImpulseChannel

http://www.abc.net.au/news/2016-07-14/solar-impulse-2-lands-in-cairo-finishing-penultimate-flight/7628668

http://www.bbc.com/news/science-environment-36781197

http://www.pcworld.com/article/3095299/solar-impulse-2-is-one-flight-away-from-circling-the-globe-on-no-fuel.html