5,000 kilometers per hour. supposedly, according to russia anyway, the missile they used is a new hypersonic that goes as fast as mach 10. actual missile defense is next to useless anyway, the whole fucking triad only has like a 30% chance of downing anything, but it's unlikely they'd even detect something going that fast before it was too late, and even if they did their counter battery will never be able to keep up with it.
United States