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Associated Press
In this March 31, 2015 photo, Swiss pilots Andre Boschberg, left, and Bertrand Piccard stand in the cockpit of their solar powered plane after it touched down at Chongqing Jiangbei International Airport in southwestern China's Chongqing Municipality. Borschberg said Sunday, May 3, 2015 that he is anxious but excited about flying the Solar Impulse 2 solo from China to Hawaii on the longest leg of the first attempt to fly around the world without using a drop of fuel. (Chinatopix via AP) CHINA OUT

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