Breaking Energy recently spoke with Solar Impulse co-founders Bertrand Piccard and André Borschberg about their ambitious goal to fly around the world in a solar-powered airplane that uses zero liquid fuel and can fly through the night.

A major milestone along the path to that goal will be reached in the coming weeks when Solar Impulse flies from San Francisco (Moffett Airfield) and stop in four US cities including Phoenix, Dallas Fort Worth and Washington D.C. before reaching New York’s JFK airport, its final destination in early July. Keep reading →