There are non-nuclear options for ICBMs. The most interesting is Terminal High Altitude Area Defense (THAAD) https://en.wikipedia.org/wiki/Terminal_High_Altit

There are non-nuclear options for ICBMs. The most interesting is Terminal High Altitude Area Defense (THAAD) https://en.wikipedia.org/wiki/Terminal_High_Altitude_Area_Defense https://en.wikipedia.org/wiki/Terminal_High_Altitude_Area_De... Basically you launch a missile that intercepts a high altitude missile and launch an object at it in a 'hit-to-kill'. It's been fairly successful in testing according to the link.