"The experimental plane called Solar Impulse 2 has taken off in Hawaii after a nine-month delay for repairs.

The team on the ground and at mission control let out exuberant cheers as the cutting-edge aircraft rose up into the early morning skies.

They're aiming to circumnavigate the globe using only the power of the sun."

Merrit Kennedy reports for NPR April 21, 2016. [2]