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Sales of 3-D printers are expected to double to 217,000 this year. The Defense Department is testing how they can help soldiers in the field by "printing" food, medicine and weapons, and is even exploring the ideas of printing antennas and warheads. (Associated Press)
Photo by: John Locher
Sales of 3-D printers are expected to double to 217,000 this year. The Defense Department is testing how they can help soldiers in the field by "printing" food, medicine and weapons, and is even exploring the ideas of printing antennas and warheads. (Associated Press)

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