Bertrand Piccard
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Solar Impulse 'ready to finish the job'

The zero-fuel aeroplane, Solar Impulse, is set to renew its effort to circumnavigate the globe.

Last year, the vehicle travelled from Abu Dhabi, UAE, to Hawaii, setting aviation records along the way. Now, it is about to head to North America.

Project chairman and pilot Bertrand Piccard spoke to our correspondent Jonathan Amos about what had been achieved so far.