A view of the Solar Impulse 2 in flight after taking off from Al Bateen Airport in United Arab Emirates, in this handout picture provided to Reuters, courtesy of Jean Revillard, on March 9, 2015. The flight began the maiden leg of Solar Impulse 2’s journey around the world. (REUTERS/Jean Revillard/Handout via Reuters)
Solar Impulse 2 descends to land in Muscat March 9, 2015. (REUTERS/Jean Revillard/Handout via Reuters)
A member of the ground staff holds a wind protector pipe of the Solar Impulse 2 after it landed at the airport in the western Indian city of Ahmedabad March 11, 2015. (REUTERS/Amit Dave)
The Solar Impulse 2 is seen in flight after taking off at the airport in the western Indian city of Ahmedabad March 18, 2015. (REUTERS/Amit Dave)
Solar Impulse 2 takes-off for its fourth flight from Varanasi to Mandalay, Myanmar with Bertrand Piccard at the controls, March 18, 2015. (REUTERS/Jean Revillard/Handout via Reuters)
The Solar Impulse 2 is seen taking off at the Mandalay international airport March 30, 2015 on its flight to Chongqing, China. Picture taken with slow shutter speed. (REUTERS/Soe Zeya Tun)
Swiss pilot Bertrand Piccard takes a selfie with his arm outside the Solar Impulse 2 plane during the sixth leg of the round-the-world trip, from Chongqing Jiangbei International Airport to Nanjing Lukou International Airport in Jiangsu province, in China, in this April 21, 2015 handout photograph released by Solar Impulse. (REUTERS/Bertrand Piccard/Solar Impulse/Handout via Reuters)
The Solar Impulse 2 plane takes off at the Nanjing Lukou International Airport, Jiangsu province, China, May 31, 2015. The plane was supposed to reach Hawaii on this seventh leg of its round-the-world trip, but bad weather forced pilot Andre Borschberg to land in Nagoya, Japan. (REUTERS/Stringer)
The Nagano mountain area in Japan is pictured by pilot Andre Borschberg in the cockpit of the Solar Impulse 2 plane during the seventh leg of the round the world trip in this June 1, 2015 handout photograph released by Solar Impulse. (REUTERS/Andre Borschberg/Solar Impulse/Handout via Reuters)