GE's 3D "ad." Of all the places, I saw this linked on Facebook. www.ozy.com/fast-forward/this-tiny-3-d-printed-jet-engine-could-have-big-promise/77490?utm_source=OZYGE1&utm_medium=email&utm_campaign=051617 THIS TINY 3D PRINTED JET ENGINE COULD HAVE BIG PROMISE