Round-the-world solar plane takes off from Nanjing for Hawaii
The first round-the-world solar-powered flight took off from China on Sunday (May 31).
People take pictures as the Swiss-made solar-powered plane Solar Impluse 2 takes off from Nanjing's Lukou International Airport in Nanjing, in China's eastern Jiangsu province, early on May 31, 2015. The revolutionary Solar Impulse 2 aircraft took off early on May 31 for a six-day flight over the Pacific Ocean, the most ambitious leg of its quest to circumnavigate the globe powered only by the sun. (AFP/Getty Images)