3D printer in space

http://www.space.com/27211-made-in-space-3d-printer.html

The first-ever item to be 3D-printed in space is being kept a well-guarded secret.
The first 3D printer designed to operate in zero gravity is set to launch to the International Space Station early on Saturday morning (Sept. 20) on board a NASA-contracted SpaceX Dragon cargo spacecraft. Once installed on the orbiting laboratory, the device will be put through a series of tests to learn if additive manufacturing — better known as 3D printing — is