Richard Branson and aerospace designer Burt Rutan on Monday are expected to unveil a Virgin Galactic aircraft that will launch a commercial spaceship. Details on the spaceship are guarded, but some reports say the carrier aircraft, dubbed White Knight Two, will have the same 140-foot wingspan as the Boeing B-29 Superfortress. Flight testing is scheduled for the end of September. Virgin Galactic officials say SpaceShipTwo is only 70% complete.
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