JFK speaks to the UN on Sept. 20, 1963. (UN photo credit, Teddy Chen.)
Yes. It happened on September 20, 1963, according to History.com. It is one of the lesser known but more important events in the last months of President Kennedy’s life and presidency.
In the fall of 1963, JFK was on a political roll. His approval ratings had climbed. He had overcome the grumbling of the Pentagon and all but secured Senate ratification of the popular Limited Test Ban Treaty, banning nuclear explosions in space. Then he went to New York to say something daring.
“I said that Casasin was another problem. The man had worked for us abroad under non-official cover …. He had run an agent into the USSR, that man having met a Russian girl and eventually marrying her. Our assumption is that the interest in the man is that the agent was successful in getting his Russian wife out of the country, as Oswald was in getting Marina out … “
— CIA memo on meeting with staff of House Select Committee on Assassinations (HSCA).