NASA 3D-prints and fires rocket engine component
http://www.gizmag.com/3d-printed-rocket/28264/

Star Trek’s Mr. Scott will have fewer reasons to panic as the day comes closer when even rocket engines can be cranked out on 3D printers. In recent tests, NASA and Aerojet Rocketdyne fired a rocket engine injector at NASA’s Glenn Research Center in Cleveland, Ohio that was made using a 3D printer. The project, done in collaboration between NASA and private industry, aims at speeding up the manufacture of rocket components while reducing costs as well as eventually printing them in space.

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