Solar plane flies for 90 mins.

A solar-powered airplane designed to fly around the world without fuel, successfully flew for 90 minutes above the Swiss countryside.

This airplane is making the around-the-world dream of two Swiss adventurers possible.

The Solar Impulse, which has 12,000 solar cells built into its wings, is a prototype for an aircraft intended to fly around the world without fuel by 2012 to promote renewable energy.

The solar powered aircraft 'Solar Impulse' (HB-SIA prototype) steered by test pilot Markus Scherdel is airborne during its maiden flight at the military airport in Payerne, Switzerland, Wednesday, April 7, 2010. (AP Photo/Christian Hartmann, pool)