Boom Supersonic has successful second test flight breaking sound barrier. More for You. Travis Kelce speaks out after Kansas City Chiefs’ heavy Super Bowl defeat.

The speed of sound is known as Mach 1 (767 mph), and when an object moves beyond this, it's called "breaking the sound barrier." This is also known as supersonic flight, a scientific term ...

The U.S. Navy’s F-35C deliveries will be cut from 17 to 12, and the U.S. Marine Corps will see a reduction of two jets – though it’s not clear if this means fewer F-35Bs, F-35Cs, or a mix.