Solar Impulse 2 embarks on world tour final leg

A sun-powered Solar Impulse 2 aircraft on a record-breaking flight around the world to promote renewable energy was due to depart from Cairo early Sunday on the last leg of its journey. "It's a project for energy, for a better world," Swiss pilot Bertrand Piccard told journalists standing in front of the plane which weighs no more than a large car but has the wingspan of a Boeing 747. The plane was scheduled to depart at 1 am Cairo time (2300 GMT) for Abu Dhabi.