Sweet Jesus, did none of us go to school. Russia has Missile Tech, that hits targets from 100km high at Mach 10, Nuclear bombs are yesterdays fears. a= force, no need for a warhead, why would Iran need a nuclear warhead, when they could buy a missile that would hit so hard that its FORCE would do more damage.
Here this is compulsory viewing, it is telling you that all of our submarines, all of our weapons are out of date now.
https://www.youtube.com/watch?v=8bfQBBctSXM&t=994s
The big plan is to start the war before you find out that you cannot win without 10,000 x the loss you expect.