A view of the Solar Impulse 2 on 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. Two Swiss pilots, Bertrand Piccard and Andre Borschberg, attempting the first flight around the world in a solar-powered plane began the maiden leg of their voyage on Monday, the mission’s official website said. Solar Impulse 2 took off from Abu Dhabi in the United Arab Emirates en route to the Omani capital Muscat at the start of a five-month journey of 35,000 km (22,000 miles) organised to focus the world’s attention on sustainable energy. REUTERS/Jean Revillard/Handout via Reuters (TRANSPORT ENERGY ENVIRONMENT TPX IMAGES OF THE DAY) ATTENTION EDITORS – FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THE AUTHENTICITY, CONTENT, LOCATION OR DATE OF THIS IMAGE. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS