I met John Glenn at UC once
He was campaigning for the Senate and spoke at the University of Cincinnati. I actually sat next to him at an after rally gathering. He was extremely friendly, a true gentleman. I showed him a copy of a print which I had sent to him, and he said that he remembered receiving it.
I also saw the late Neil Armstrong up close and personal at UC. He started to walk into one of my classes, realized he was in the wrong place (I was definitely NOT taking astrophysics), said "Oh." and left.
Schrodinger's cat walks into a bar and doesn't.