(Reuters )
World's Most Advance Solar Plane Soars over Golden Gate Bridge
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APRIL 24, 2013

The world's most advanced solar-powered plane successfully carried out its latest test flight on Tuesday, soaring at 3,000 feet above the Bay Area of California and the iconic Golden Gate Bridge.
The Solar Impulse, which weighs only about 3,500 pounds, runs completely on power from the sun drawn from 12,000 solar cells that send energy into batteries that power propellers running on four electric motors.
Tuesday's flight was a technical test run to prepare for a planned cross-country trip beginning in early May.
Read more: Daily Mail