In pictures: Sun-powered Solar Impulse 2 touches down in Cairo International Airport

The experimental plane had completed the first solo transatlantic flight powered only by sunlight to land in Spain last month, and will continue from Cairo to Abu Dhabi, where it began its marathon journey in March last year
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(Image: @solarimpulse)
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Solar Impulse 2, the solar powered plane, lands at Cairo International Airport on July 13, 2016, for the penultimate stage of its world tour. The experimental plane had completed the first solo transatlantic flight powered only by sunlight to land in Spain last month, and will continue from Cairo to Abu Dhabi, where it began its marathon journey in March last year. (Khaled Desouki/AFP/Getty Images)
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Solar-powered Solar Impulse 2 aircraft lands at Cairo International Airport on July 13, 2016, for the penultimate stage of its world tour. The experimental plane had completed the first solo transatlantic flight powered only by sunlight to land in Spain last month, and will continue from Cairo to Abu Dhabi, where it began its marathon journey in March last year. (Khaled Desouki/AFP/Getty Images)
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Swiss pilot Andre Borschberg (R) is welcomed by fellow pilot Bertrand Piccard after landing Solar Impulse 2, the solar powered plane, at Cairo International Airport on July 13, 2016, for the penultimate stage of its world tour. The round-the-world solar flight is estimated to take some 500 flight hours and cover 35,000 km with Swiss founders and pilots, Bertrand Piccard and Andre Borschberg landing every few days to switch between piloting and hosting public events. (Khaled Desouki/AFP/Getty Images)
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The ground crew of Solar Impulse 2, the solar powered plane, surrounds the aircraft after it landed at Cairo International Airport on July 13, 2016, for the penultimate stage of its world tour. The round-the-world solar flight is estimated to take some 500 flight hours and cover 35,000 km with Swiss founders and pilots, Bertrand Piccard and Andre Borschberg landing every few days to switch between piloting and hosting public events. (Khaled Desouki/AFP/Getty Images)
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