Virgin spaceship passes technical milestone
7 September 2013 Last updated at 17:44 BST
What looks like being the world's first commercial space plane has just passed another technical milestone.
Virgin Galactic's SpaceShipTwo has just flown faster and higher than ever before on its journey to take ordinary, fare-paying customers 70 miles above the earth.
The first passengers should be floating around in zero gravity in around a year's time.
Transport correspondent Richard Westcott reports.