It seems logical that modern fighter jets would be faster than those that flew half a century ago. But the opposite is true. The Vietnam-era F-4 Phantom could reach Mach 2.2, or about 1,500 mph, while ...

Kratos Defense will utilize the Hermeus high-speed Quarterhorse aircraft as part of its support work for the U.S. Navy and Missile Defense Agency’s Multi-Service Advanced Capabilities Hypersonic ...

Humankind was once determined to break the sound barrier, as it was considered the ultimate achievement in speed. But our technology didn't stop there, as we've built experimental vehicles that can ...