3D printing technology is used often in the military these days: the Marine Corps created a 3D printed surveillance drone, the Air Force in multiple countries have found applications for the technology, and last year the US Navy successfully tested three Trident II D5 missiles featuring a 3D printed component. Speaking of 3D printed components, we've also seen submarines equipped with 3D printed parts, but Oak Ridge National Laboratory (ORNL) has been working with the Naval Surface Warfare Center, Carderock Division's Disruptive Technology Lab to create the military's first 3D printed submarine hull. The submarine hull, called the Optionally Manned Technology Demonstrator (OMTD), was developed at ORNL's Manufacturing Demonstration Facility (MDF) and is the US Navy's largest 3D printed asset. Read more at 3DPrint.com: http://3dprint.com/181795/navy-ornl-...nted-sub-hull/