The Big Picture: Preparing for a solar-powered flight around the world

Earlier this week, the second Solar Impulse aircraft embarked on its maiden voyage over Payerne, Switzerland. Solar Impulse 2 hopes to expand on the success of its predecessor, and make an around-the-world flight in 2015. The 72 meter-wide wing houses over 17,000 solar panels that can power the craft with virtually unlimited autonomy. The global voyage will take a five months, and is planned to launch in March.