ABU DHABI, UAE - JULY 26: In this handout image supplied by Jean Revillard, Swiss pioneers Bertrrand Piccard (top left) and Andre Borschberg (top right) celebrate with the Solar Impulse team after landing in Abu Dhabi to finish the first around the world flight without the use of fuel on July 26, 2016 in Abu Dhabi, UAE. The The 42,000 km journey was completed in 17-stages across four continents. The Solar Impulse 2 is equipped with 17,000 solar cells, has a wingspan of 72 metres, and yet weighs just over 2 tonnes. (Photo by Jean Revillard/Solar Impulse2 via Getty Images)
