NYC was most definitely targeted by nuclear weapons, that's not the argument. The Anti-Ballistic Missile Treaty had a provision for each signatory to have two anti-ballisitic missile complexes and no more than a total of 100 missiles. A large population along with the financial resources of Wall Street would be key in a national/international recovery, hence why 33 Thomas Street exists with its significant fraction of telephone switches in the US at the time. If a few also spared surrounding cities in the heat of the moment, well so be it, its not like the other side is going to have much of a chance to call 'foul'. It's called the 'Long Lines' building - interestingly, the name refers to a microwave over-horizon system in place in case just such a catastrophe occurs to ensure national communication remains effective. Washington was almost certainly *not* such a site, as to where the other one might have been I am not sure but would not be surprised if Alaska, southern Kansas/SW Missouri, North Bay OT, North Dakota, or especially central/eastern Tennessee came up.