The fastest air-breathing vehicle ever built was the NASA X-43. Only three of these aircraft were built, with one being destroyed and two operating successfully. The X-43 testbed aircraft measured 12 ...

expertise with hypersonic vehicles and spacecraft. On Saturday, a NASA Dryden Flight Research Center B-52 aircraft flown from Edwards Air Force Base, Calif., carried the X-43A off the California coast ...

A news media briefing for the final X-43A hypersonic-research flight is scheduled for Friday, Nov. 5, 2004, at 1 p.m. EST. The event is at NASA’s Dryden Flight Research Center (DFRC), Edwards, Calif.

NASA's X-43A hypersonic demonstrator is gearing up for its second Mach 7 flight attempt next month, the outcome of which may determine whether the program will make a third flight attempt at Mach 10.