June 26: View of the unveiled airplane Solar Impulse in Zurich-Duebendorf, Switzerland. The innovative plane is created to fly around the world powered entirely by solar energy. With lithium batteries it will be capable of flying at night as well. Solar Impulse looks like a glider with the wingspan of 63 meters (207 feet). The wings will be covered with 250 square meters of solar-cells. The plane will take part in a series of test flights over the next two years, and based on the results of those a new plane will be constructed for the big takeoff, in 2012.