SpaceShipTwo made its first unpowered flight on Oct. 10 at Mojave Air & Space Port. The program is progressing toward tests in which the craft will fire its rocket motor.
Virgin Galactic plans to fly tourists on brief suborbital flights at a cost of $200,000 per person.
Virgin founder Sir Richard Branson said last week that a deal with the Abu Dhabi investment fund Aabar Investments has successfully closed, securing funding for the rest of the development program.