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Roll-out for Nasa's test rocket

The US space agency, Nasa, is rolling out its Ares 1-X test rocket.

The super-slim, 100m-tall launcher is a demonstrator for the vehicle Nasa plans to use in the next decade to take its new astronaut crewship into orbit.

The Ares I-X is expected to make an unmanned, two-minute flight at the end of the month to check out basic design concepts and gather engineering data.