[familyop]

"S-400 has been designed to intercept and destroy airborne targets at a distance of up to 400 kilimeters (250 miles),..."

It's an enormous, expensive missile with an exploding warhead--part of a very overrated SAM system.

[Lonesome in Massachussets]

A fragmentation warhead? Probably not very effective against ballistic missiles. The U.S. interceptors us kinetic energy (hard kill) capability.

Of course, the old Spartan system used a multi-megaton warhead, until Jimminy Carter shut it down.