Harpo was there (did Groucho follow his the brother?):-
Harpo's last letter to Truman— not dated, but sent in about May 1963— enclosed a photograph of himself standing in the Harry S. Truman Forest in Israel. "There were several reasons for taking this photo— mostly my great pride in there being such a place [as the Truman Forest] and such a man as you," Harpo wrote. "My reason for sending it is simpler— I thought you might not know how tall and strong the trees have grown. Hope its symbolical."