Reuters: The flight from San Fransisco to Phoenix took 18 hours and 18 minutes on Saturday - and didn't use a drop of fuel.
A solar-powered airplane that developers hope eventually to pilot around the world landed safely in Phoenix on the first leg of an attempt to fly across the United States using only the sun's energy, project organizers said.
The plane, dubbed the Solar Impulse, took 18 hours and 18 minutes to reach Phoenix on the slow-speed flight, completing the first of five legs with planned...