Test pilot takes off for a test flight of the SolarStratos aircraft in Payerne
Test pilot Damian Hischier takes off for a test flight of the SolarStratos aircraft, a solar-powered two-seater aircraft with a mission to fly some 24,000 meters (over 78,000 feet) above earth set to take place in 2018, in Payerne, Switzerland May 5, 2017. REUTERS/Denis Balibouse