Solar Impulse's team chief Bertrand Piccard, left and Solar Impulse's Chief Executive Officer and pilot Andre Borschberg celebrate after successfully landing the solar-powered HB-SIA prototype airplane after its first successful night flight attempt at Payerne airport,Switzerland on Thursday, July 8, 2010. The propeller plane, with a 61-metre (200-foot) wingspan, is powered by four electric motors and designed to fly round the clock without traditional aviation fuel or polluting emissions by saving surplus energy from its 12,000 solar cells in high-performance batteries. The plane took off for its first 24-hour test flight just after dawn on Thursday; it will run on stored power during the night and land at Payerne Friday morning.[Xinhua/Reuters]