
The first of three X-43A hypersonic research aircraft and its modified Pegasus® booster rocket underwent combined systems testing while mounted…

Pathfinder aircraft in flight.

The second X-43A hypersonic research aircraft and its modified Pegasus booster rocket left the runway, carried aloft by NASA's B-52B…

Pathfinder in flight over Hawaii.

An artist's conception of the X-43A Hypersonic Experimental Vehicle, or "Hyper-X" in flight.

SR-71 landing with drag chute.

NASA engineers monitored mission progress from a Dryden control room prior to launch of the X-43A scramjet and its booster…

Crew members serviced the Pathfinder solar-powered aircraft on Rogers Dry Lake after a research flight at NASA's Dryden Flight Research…

SR-71A in flight over southern Sierra Nevada Mountains.

NASA's historic B-52 mothership carried the X-43A and its Pegasus booster rocket on a captive-carry flight from Edwards Air Force…