The Quarterhorse Mk 2.1 is part of a rapid development program by Hermeus aimed at building reusable high-speed aircraft.

Add Yahoo as a preferred source to see more of our stories on Google. In a step that could bolster the U.S.'s hypersonic weapons push, the Pentagon on Monday confirmed the second successful test of a ...

The Defense Innovation Unit achieved a successful suborbital launch of a hypersonic test platform that demonstrated sustained, air-breathing cruise at speeds exceeding Mach 5, according to Pentagon ...

Several modern fighter jets can exceed Mach 2 at altitude, although the most advanced, like F-35 and J-35, sometimes max out ...