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 ...

NASA plans to conduct community overflights beginning this year, flying the X-59 over select American cities to collect public feedback on the “sonic thump.” Still, in some quarters, the dream lives ...

Some disagree, but there are signs that indicate a heightened interest among aviation's major players in hydrogen propulsion as a real, available solution for green commercial flying. As big names ...