It's not that hard to hit something going Mach 5 or so at high altitude. That translates to speeds of just over 5000km/h. The really hard thing is to hit targe

It's not that hard to hit something going Mach 5 or so at high altitude. That translates to speeds of just over 5000km/h. The really hard thing is to hit targets that go close to orbital velocity (for example when trying to hit a hypersonic missile going 11 000km/h+ or a ballistic missile going 20 000km/h.