ICBMs travel 30 times faster than a bullet and 7 times faster than a hypersonic scramjet cruise missile. If we're talking MIRVs that can randomly dodge before

ICBMs travel 30 times faster than a bullet and 7 times faster than a hypersonic scramjet cruise missile. If we're talking MIRVs that can randomly dodge before they hit their targets, that is a stupidly hard problem. Better to try to cure cancer and just not get into a nuclear war.