A promise to fly around the world on solar power only..... take-off, climb and cruise using batteries which are charged and recharged by solar power. It even flies at night! "Some" design and test work is still needed to make it commerically viable: wingspan comparable to an A340, only 1600kg, and room for 1 person. But this beautiful aircraft may be the start of solar powered aviation era. 

The Solar Impulse was unveiled the 26th of June in Switzerland. Click here for more information: http://www.solarimpulse.com/