Today in 2016, the Swiss long-range experimental solar-powered aircraft project Solar Impulse successfully flew one of its planes, the Solar Impulse 2, around the globe. Pilots Bertrand Piccard and André Borschberg took turns piloting the craft from city to city. Solar Impulse 2 took off from Al Bateen Executive Airport in Abu Dhabi on March 9, 2015. The flight was originally planned to finish in August, but necessary repairs and unfortunate weather led to the flight lasting 16 1/2 months.   Image Credit: Wikipedia