True and Russia as well has the range to reach us with their own nukes. But this will never happen, at least not by these countries or any other government which has defined borders for the country it controls.
America has at a minimum 20 nuclear subs on patrol throughout the world at all times, each one having about 24 nuclear missiles of the MIRV variety meaning about 10 nukes per missile with each war head independently targeted. Do the math, 20 x 24x 10 = 4800 nukes which can be directed at any target on the planet within a time frame of several hours to 3-4 days depending on the location of our submarine.
Tracing where a nuke comes from is relatively easy also and is dome by using technology which allows the ‘signature’ of the reactor from which the material for the bomb was generated.
My belief is the world has been already put on notice that if this nation is ever attacked with nukes, the offending nation or in fact which ever Nation we SAY is the offending nation will be reduced to a mountain of radioactive slag within hours. In the case of a terrorist attack the strongholds of the terrorists would be nuked and probably those Nations who are known to support them financially such as Iran and Saudi Arabia.
The US (and Russia) are bound by the START-II treaty to restrict the number of ballistic missile submarines to 14. That’s why 4 of the Ohio class subs were recommissioned to for conventional strike and special operations.
About reducing any nation to slag, well of course. But we need to remember that it cuts both ways particularly with regard to nations such as China and Russia. If it weren’t so, North Korea and Iran wouldn’t be so cocky today.