Remembering History: One of the most iconic images in American history: On Nov. 25, 1963 -- his third birthday -- John Jr. salutes the casket of his father, who was assassinated three days earlier.

One of the most iconic images in American history: On Nov. 25, 1963 -- his third birthday -- John Jr. salutes the casket of his father, who was assassinated three days earlier.

One of the most iconic images in American history: On Nov. 25, 1963 -- his third birthday -- John Jr. salutes the casket of his father, who was assassinated three days earlier.