In pictures: Solar Impulse 2 heads to Abu Dhabi on the final leg of its world tour

The team identified a weather window that could allow them overcome the challenging high temperatures across Saudi Arabia and hopefully land in Abu Dhabi after 48 and 72 hours
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The Solar-powered Solar Impulse 2 aircraft prepares to take off from the Cairo International Airport in the Egyptian capital on July 24, 2016, as it heads to Abu Dhabi on the final leg of its world tour. (Khaled Desouki/AFP/Getty Images)
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The Solar-powered Solar Impulse 2 aircraft takes off from the Cairo International Airport in the Egyptian capital on July 24, 2016, as it heads to Abu Dhabi on the final leg of its world tour. (Khaled Desouki/AFP/Getty Images)
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The Solar-powered Solar Impulse 2 aircraft prepares to take off from the Cairo International Airport in the Egyptian capital on July 24, 2016, as it heads to Abu Dhabi on the final leg of its world tour. (Khaled Desouki/AFP/Getty Images)
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The Solar-powered Solar Impulse 2 aircraft prepares to take off from the Cairo International Airport in the Egyptian capital on July 24, 2016, as it heads to Abu Dhabi on the final leg of its world tour. (Khaled Desouki/AFP/Getty Images)
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Pilot Bertrand Piccard talks to media before his take-off in the Solar-powered Solar Impulse 2 aircraft from the Cairo International Airport in the Egyptian capital on July 24, 2016, as it heads to Abu Dhabi on the final leg of its world tour. (Khaled Desouki/AFP/Getty Images)
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Pilot Bertrand Piccard talks to media before taking off in the Solar-powered Solar Impulse 2 aircraft from the Cairo International Airport in the Egyptian capital on July 24, 2016, as it heads to Abu Dhabi on the final leg of its world tour. (Khaled Desouki/AFP/Getty Images)
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Pilot Bertrand Piccard talks to media before his take-off in the Solar-powered Solar Impulse 2 aircraft from the Cairo International Airport in the Egyptian capital on July 24, 2016, as it heads to Abu Dhabi on the final leg of its world tour. (Khaled Desouki/AFP/Getty Images)
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The Solar-powered Solar Impulse 2 aircraft prepares to take off from the Cairo International Airport in the Egyptian capital on July 24, 2016, as it heads to Abu Dhabi on the final leg of its world tour. (Khaled Desouki/AFP/Getty Images)
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A technician prepares the Solar-powered Solar Impulse 2 aircraft at the Cairo International Airport in the Egyptian capital on July 23, 2016, ahead of the final leg of its world tour. The Mission Control Center team of the Solar Impulse 2 are preparing for a second attempt to leave Cairo arport for the final leg of it's trip after the flight was postponed earlier in the month due to weather conditions. The team identified a weather window that could allow them overcome the challenging high temperatures across Saudi Arabia and hopefully land in Abu Dhabi after 48 hours. (Khaled Desouki/AFP/Getty Images)
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Technicians prepare the Solar-powered Solar Impulse 2 aircraft at the Cairo International Airport in the Egyptian capital on July 23, 2016, ahead of the final leg of its world tour. The Mission Control Center team of the Solar Impulse 2 are preparing for a second attempt to leave Cairo arport for the final leg of it's trip after the flight was postponed earlier in the month due to weather conditions. The team identified a weather window that could allow them overcome the challenging high temperatures across Saudi Arabia and hopefully land in Abu Dhabi after 48 hours. (Khaled Desouki/AFP/Getty Images)