Solar Impulse sets off for Washington DC via Cincinnati

A solar-powered plane aiming to cross the US coast-to-coast has set off on its fourth leg, from St Louis, Missouri, to Washington DC. But the Solar Impulse team made a last-minute decision to stop over briefly in Cincinnati, Ohio, because of strong winds expected on the journey. via Pocket http://www.bbc.co.uk/news/science-environment-22902402#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa