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NASA preparing to launch 3-D printer into space
Project manager Matthew Napoli, left, and director of research and development Michael Snyder test a 3D printer which will eventually be used in space on Monday, Sept. 16, 2013, at Made in Space in Mountain View, Calif. One of the biggest obstacles to space exploration is that you need to bring everything with you: tools, equipment, spare parts, satellites. NASA is working with a Silicon Valley company to make specialized 3D printers that would allow astronauts to produce the things they need on-demand when they're in space, allowing them to travel farther from the Earth. (AP Photo/Marcio Jose Sanchez)

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