- The overall program includes two demonstrations for an air-breathing vehicle and a boost-glide vehicle that focus on near-term enabling technologies that require flight testing.
- High Speed Strike Weapon (HSSW) is a Lockheed Martin Skunk Works concept under which the company plans to demonstrate hypersonic flight and to provide the basis for future hypersonic programmes, including both expendable missiles and reusable aircraft.
- They want maturing technologies in six areas: modeling, simulation, and analysis (MS and A); ordinance; guidance navigation and control and airframe; propulsion; materials and structures and manufacturing; and conceptual design and systems integration.