DARPA picks Boeing to build a test design of an air-launched satellite launcher.

The competition heats up: DARPA has chosen Boeing to build a test design of an air-launched satellite launcher.

This engineering research is in parallel with the airborne launcher research of Scaled Composites (on SpaceShipTwo) and Stratolauncher. When you add SpaceX’s effort to make its first stage reusable, you get a real sense where the future of rocket design is heading: rockets in which the first stage is entirely reusable, returning safely to Earth either by a horizontal or vertical landing.