Could Red October have another meaning, like the easing of tensions with a previous enemy state/ communist nation like East Germany? Then working together under these new condition that were previously un-thought of?
https://youtu.be/AzIlL5NFvAo
Could have two meanings
Trident 2's were phased out.
Ohio subs carry Trident C4 missiles, and the refueled subs carry Trident D5 missiles now.
The Sea Dragon, info is obscure, is a SM-6.
It's twang is only 180 m8les, so it would have a very difficult time hitting AF1, if not impossible.
Any planefags have the course and time of AF1 or other high value aircraft such as Japanese Prime Minister She's aircraft? Perhaps they flew over Vancouver Canada? Time and route are KEY factors.
If a Ticonderoga class Cruiser or Arleigh Burke class Destroyer was off Washington coast it could destroy the SLBM on terminal phase. This would be the only way, other that a space base defense, that would kill a SLBM that I can think of that doesn't require a land based defense. I admit, it would be a hell of a task, but they have had success with the system.
I'm not a ship tracker so, I cannot verify what was on the coast, if anything, at that time. It's impossible to concretely say Seattle was the target, but it really would have increased their odds of success being so close. I think the Aegis says has a pretty remarkable record of kills vs failures and there is the land based systems in Alaska (GMD) that may have played a roll.
https://en.m.wikipedia.org/wiki/Aegis_Ballistic_Missile_Defense_System
https://en.m.wikipedia.org/wiki/Ground-Based_Midcourse_Defense
https://news.usni.org/2015/08/04/successful-sm-6-ballistic-missile-defense-test-set-to-expand-capability-of-u-s-guided-missile-fleet