The song "What One Man Can Do" (by John Denver) was sung about a person.
Who is that person?
...Denver proposed "my toast to Bucky." John had composed it especially for the event, and his guests, touched and teary-eyed, joined in the chorus: "What one man can do is dream/What one man can do is love/What one man can do is change the world and make it new again." Then John Denver kissed the grand old man, stroked the back of his neck and murmured, "I love you, Bucky."