Solar plane takes off from Egypt on final leg of world tour
By Lila Hassan CAIRO (Reuters) - An aircraft powered by solar energy left Egypt on Sunday on the last leg of the first ever fuel-free flight around the globe. Solar Impulse 2, a spindly single-seat plane, took off from Cairo in darkness en route to Abu Dhabi, its final destination, with a flight expected to take between 48 and 72 hours. The plane, which began its journey in Abu Dhabi in March 2015, has been piloted in turns by Swiss aviators Andre Borschberg and Bertrand Piccard in a campaign to build support for clean energy technologies.