Very cool picture of your dad; he has that "Rod Serling" (from "The Twilight Zone") look going on (tight suit with thin tie). That was the fashion of the time (late 50's/early 60's).
I used to have a head of hair like him... but it was at about the same time as when that picture was taken.
Michael Corleone was dealing with Hyman Roth when that picture was taken.
