A pilot waves to the press in front of the Solar Impulse 2, the world's largest solar-powered aircraft, before taking off at the Mandalay International Airport in Myanmar on March 30, 2015. Solar Impulse 2 took off from Mandalay, the second largest city of Myanmar, for Chongqing in China, its fifth flight after embarking on a landmark journey to circumnavigate the globe powered solely by the sun. (Photo/Agencies)
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