The US premier 'deterrent' weapon is the fabled Peacekeeper missile
Circular Error Probable (radius within which the missile is pretty guaranteed to hit in): Doesn't matter
Carries 10 independent MK-21 warheads which can each hit areas in different parts of a country.
Menu of death aboard one of these single warheads.
MM I/A-Mark 5 - 1.2-MT / W59
MM I/B-Mark 11 - 2-MT / W56
MM II-Mark 12 - 170-kt / W62 - MIRV
MM III-Mark 12A - 375-kt / W78 - MIRV
MM III-Mark 21A - 300-kt / W87 - single warhead
As of the SALT talks we should have in our silos predominantly Mark 21As which is a single missile.... so that people somewhere out in space can sleep better I guess.
The last sight you are likely to see.
But there is always the possibility that someone might be able to disable all of the 500 or so MMIIIs and 50 or so MX variants sitting around, in which case you'll likely be awakened with a gift from:
US Ohio Class
Carries 24 Trident I or II (doesn't matter really, either would cause a bad day)
A single Trident 2 missile normally carries 5-8 warheads but could be fitted with 12-14. The yield of any single warhead being 100kt
Circular Error Probable (radius within which the missile is pretty guaranteed to hit in) : 90m (i.e. within the size of a football field!)
A single Ohio class SSBN could render most countries in the world the bitch of the United States.
The United States has 18 of this single class of SSBN.
So really, it doesn't matter how powerful they are any more... any one of them is just destructive beyond conventional comprehension.
