DARPA creates a Mach 20 plane - Fastest ever created
When you think about it, at Mach 1 you are flying at the speed of sound, and if you keep going, you’d be able to see a bullet fired from a gun fly along side you and the actual sound of the gun left in the weeds. There are fighter jets that can travel a few times faster than the speed of sound, but we still hope one day we’d be traveling at the speed of light — and we’ve gotten a bit closer — Mach 20 (20 tiems the speed of sound).