I passed this place as a kid when I would go to work with my father, back when he managed the lounge and recreation area for the Plaza 400 building on East 56th Street. I would ask my dad who Dag was and my Dad would say he was a famous singer in Sweden, like their Frank Sinatra.
By the time I was 7, I already knew that a lot of the crap that came out of my father's mouth was a lie. Well, it was more of a joke, but still counts as a lie, especially because he never really admitted to the lie, even when you busted him. He'd just shrug his shoulders and say, "Have it your way."
That's the tower to the left. One Dag Hammarskold Plaza is the one to the right.