Solar Impulse sets new world record with longest solo flight

It was never a mission for the faint-hearted. And on occasions, Swiss explorers Andre Borschberg and Bertand Piccard may have been the only ones that kept the faith. On July 2, 2015, though, their aircraft, Solar Impulse 2, attempting the first round-the-world solar flight, broke all distance and duration world records for solar aviation – 90 hours, 6,800 km and counting.