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"  When Burt Rutan first unveiled sketches of the mighty SpaceShipTwo, it was in the pages of Popular Mechanics, as we awarded the legendary aerospace engineer our 2006 Breakthrough Leadership Award. But now Rutan&amp;#039;s followup to SpaceShipOne, which won the Ansari X Prize, is ready to roar for Richard Branson&amp;#039;s Virgin Galactic. The two leaders of the private space revolution said today that SpaceShipTwo is 60 percent complete and that its carrier spacecraft, WhiteKnightTwo, is 70 percent ready; test flights for both could come this year en route to first flights in 2009 or 2010. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.popularmechanics.com/space/a2543/4246011/>