United Launch Alliance has successfully launched an Atlas V rocket into orbit using several 3D printed parts made from advanced thermoplastic materials developed for them by Stratasys. Not only do these 3D printed parts shave critical weight off of the rocket, they often significantly reduce the cost of manufacturing them, which is vital when dealing with non-recoverable spacecraft like the Atlas V. The rocket has several 3D printed parts, primarily for an air ducting system in the rocket's payload fairing that keeps vital electrical components cool, including brackets, nozzles, panel close-outs. By 3D printing the parts it reduced the number of components in the ducting system from one hundred and forty parts down to just sixteen. You can read more over on 3DPrint.com: http://3dprint.com/126300/atlas-v-rocket-stratasys/