Models of WhiteKnightTwo aircrafts are seen after they were unveiled by entrepreneur Richard Branson and aircraft designer Burt Rutan in New York January 23, 2008. Branson on Wednesday unveiled a model of Virgin Galactic and Scaled Composites' new WhiteKnightTwo and SpaceShipTwo aircrafts, which he hopes will be the first to take paying passengers into space on a regular basis next year. [Agencies]