A modified Pegasus rocket ignites moments after release from the B-52B, beginning the acceleration of the X-43A over the Pacific Ocean on Nov. 16, 2004
Orbital Sciences Corp. technicians remove protective shrouds from the modified Pegasus booster before takeoff on the X-43A's Mach 9.6 record scramjet flight
The small size of the X-43A scramjet is evident in this nose-on view while mounted to its modified Pegasus booster under the wing of NASA's B-52B mothership