The Directorate currently manages the X-51A program, which is developing a scramjet demonstration vehicle. The X-51 program is working to develop a flight demonstrator for a hypersonic cruise missile which could reach anywhere on the globe in an hour. In January 2008, the Directorate used a modified Scaled Composites Long-EZ aircraft to demonstrate that a pulse detonation engine could successfully power flight. That aircraft has now been transferred to the National Museum of the U.S. Air Force at Wright-Patterson AFB for display.