VIDEO: Solar Impulse 2 Get

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Nanjing in Hawaii: Solar Impulse 2 Get

May 30, 2015 at 20:39 clock updates BST

Solar Impulse has taken off completely from the sun plane in the most difficult phase of his mission to fly a solar plane around the world.

It is expected to take six days and nights to complete the journey from China to Hawaii.

John Sudworth reports.

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