Solar-Powered Plane Completes Historic 'Across America' Flight

Solar Impulse, the world's first single passenger solar-powered airplane has come a long way since its first flight in 2009, when it rose a mere 3 feet above the ground and flew for just 1,150 feet in the 30 seconds it was in air. In 2012, the elegant green flying machine successfully completed an intercontinental trip from Europe to Africa and on July 6th, 2013, added another feather or should we say 'wing' to its cap, with a flight across the United States of America.