A solar-powered plane has left Egypt on the last leg of the first ever fuel-free flight around the globe.
Solar Impulse 2, a single-seat plane, took off from Cairo in darkness en route to Abu Dhabi, its final destination.
The flight is expected to take between 48 and 72 hours.
The plane, which started in Abu Dhabi in March 2015, has been piloted in turns by Swiss aviators Andre Borschberg and Bertrand Piccard.
"The round the world flight ends in Abu Dhabi, but not the project," Mr Piccard told Reuters a few days before take-off.
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