Posted 2/19/2008An X-51 Scramjet-Waverider mock-up hangs inside the Benefield Anechoic Facility during the vehicle's antenna testing Jan. 29 at Edwards Air Force Base, Calif. The 412th Test Wing Hypersonic Flight Test Team, Electronic Warfare and Boeing began the month-long testing Jan. 28. (U.S. Air Force photo/Mike Cassidy)