In March, the Defense Advanced Research Projects Agency (DARPA) awarded a contract to Aurora Flight Sciences to develop an aircraft that could vertically take off, land and hover with the capabilities of a helicopter but at a much faster speed than any currently existing vertical takeoff and landing (VTOL) crafts. On April 18, Aurora delivered a scale model of their LightningStrike aircraft, which was partially 3D printed and demonstrated to DARPA that the craft is on track to fulfill their goal of a VTOL that can reach speeds of over 400mph within the next two years. Read more at 3DPrint.com: https://3dprint.com/132964/aurora-hovering-aircraft/