I said that in a different post. The media dipschitz are all ablather that a hypersonic warhead can do five times the speed of sound. Seemingly unaware that an ICBM warhead comes in at Mach 15.
Not exactly true. Back around 1970, I worked with a team devising interceptors for ICBMs. While they go 15,000 MPH or so, they slow down drastically once they hit the atmosphere. IIRC US warheads impacted at about mach 2 and Soviet warheads were subsonic at impact. We could defend against missile silos by basing two very high speed rockets at each silo and firing against anything that came within 50,000 feet. That would not be decoys because if you can enter the atmosphere, you might as well do so with a real warhead, not a decoy. While this plan would have made our silos impervious to Soviet strikes, it would not do much to defend cities.
