DARPA is moving ahead with plans to build its XS-1 spaceplane

http://www.extremetech.com/wp-content/uploads/2016/04/xs1-768x424.jpg 768w, http://www.extremetech.com/wp-content/uploads/2016/04/xs1-640x353.jpg 640w, http://www.extremetech.com/wp-content/uploads/2016/04/xs1-672x371.jpg 672w, http://www.extremetech.com/wp-content/uploads/2016/04/xs1.jpg 1344w" sizes="(max-width: 300px) 100vw, 300px" />Reusable rockets are cool and all, but DARPA wants a reusable spaceplane for reaching low-Earth orbit.