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Inside the space capsule which could take humans to Mars

9 May 2011 Last updated at 22:06 BST

As Nasa prepares to retire its fleet of space shuttles, it is encouraging private companies to build new rockets to get its astronauts into orbit.

Among the firms landing huge contracts to build the next generation of spacecraft is SpaceX.

Science correspondent David Shukman visited the company's rocket factory in California for a look inside the prototype capsule.