We've been tracking the sun-powered plane known as Solar Impulse for years as it roved hither and yon. Today, Solar Impulse's pilots, Bertrand Piccard and Andre Borschberg, came to NASA's Ames research center to announce their plan to fly across America. The cross-country tour will begin in the Bay Area and end in New York, with stops in Phoenix, Dallas and Washington DC in between. Solar Impulse will also land in either Atl
