AERO - Innovations in AviationTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video04/19/2012April 19, 2012The 20th annual AERO aviation trade show under way in Friedrichshafen is focussing on fuel efficiency. It also saw the debut of the vertical take-off volocopter.https://p.dw.com/p/14h1tAdvertisement