I remember the Cuban Missile Crisis. So do I.
My active duty in the Navy Reserve started at the end of September, 1962.
I ended up on a ship based out of Gitmo during the crisis and many times afterwards.
At that time, I only had a secret clearance and that was enough to scare the hell out you.
2 years later, my active duty time was over, and I had a top secret clearance then. That made me even more scared reading about what might have happen then and if that happen, what might/could have happened.
+1: informative