Guests of honor at the Paris Air Show last week, Bertrand Piccard and Andre Borshberg, the visionaries behind the Solar Impulse project, were basking in the limelight at Le Bourget airport as their zero fuel aeroplane took off into the sunny skies of Paris yesterday. Piccard describes the thinking behind their inspirational project and why he thinks the 75 million euro price tag is a good investment. › Continue reading…