Russians have developed a missile 27 times faster than the speed of sound

In December 2019 Russia announced it has developed a new hypersonic IBM ddelivery system that they claim can fly 27 times faster than the speed of sound (20,716mph). Avangard is designed to penetrate US defences and is said by Russian officials to be “invulnerable to any missile defence system” (although US experts dispute the claims).

A hypersonic missile travels at speeds of Mach 5 and higher – five times faster than the speed of sound (3836 mph), which is around 1 mile per second.

https://en.wikipedia.org/wiki/Avangard_(hypersonic_glide_vehicle)